Q109 - Navigation Problems: Oceans, USCG prep certification 2026

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1. You desire to make good a true course of 129°. The variation is 7°E, magnetic compass deviation is 4°E, and gyrocompass error is 2°W. An easterly wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?Not learned 2. You desire to make good a true course of 132°. The variation is 10°W, magnetic compass deviation is 5°E, and gyrocompass error is 5°W. A northeast by east wind produces a 5° leeway. What is the course to steer per standard magnetic compass to make the true course good?Not learned 3. A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?Not learned 4. The track line on the chart is 274°T. Variation is 4°E, and deviation is 2°E. The gyro error is 1.5°E. What course would be steered by gyrocompass to make good the desired course?Not learned 5. The true course between two points is 312°. Your gyrocompass has an error of 3°W. You make an allowance of 4° leeway for a west by south wind. What gyro course should be steered to make the true course good?Not learned 6. The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in which LONG?Not learned 7. In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance?Not learned 8. Your 0000 zone time position on 13 June is LAT 24° 35' N, LONG 142° 26' E. Your vessel is on course 245° T, speed is 13.5 knots. What is the zone time of sunrise?Not learned 9. At 0100 zone time on 23 September your DR position is LAT 24°25.0'N, LONG 83°00.0'W. You are steering course 315°T. The speed over the ground is 10.0 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1100 running fix. ZONE OBSERVED TIME GHA ALTITUDE(Ho) DECLINATION ---- --- ------------ ----------- 0700 17°20.1' 21°09.0' S 00°09.7' 0900 47°03.0' 46°05.0' S 00°11.6' 1100 77°06.4' 63°16.1' S 00°13.5'Not learned 10. At 0327 ZT on 29 May, your DR position is LAT 25° 00' N, LONG 64° 15' W. You are steering 270° T at a speed of 13.6 knots. What is the zone time of sunrise?Not learned 11. At 0400 zone time on 24 June, your DR position is LAT 23° 10.0' N, LONG 085° 33' W. You are steering 295° T at a speed of 10.0 knots. What is the zone time of sunrise?Not learned 12. At 0450 zone time, on 25 June your DR position is LAT 21° 26.0' N, LONG 160° 24.5' W. You are steering course 100° T at a speed of 10 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0514 running fix. Body Zone Time GHA Observed Altitude Declination Mirfak 450 100°25.9' 35°27.4' N 49°47.5' Fomalhaut 502 169°59.9' 38°01.3' S 29°43.1' Altair 514 219°39.9' 31°39.5' N 8°49.1'Not learned 13. At 0500 zone time on 21 August, your DR position is LAT 47°00'N, LONG 125°15'W. You are steering 000°T at a speed of 9.8 knots. What is the zone time of sunrise?Not learned 14. At 0520 zone time on 17 March, while taking stars for a morning fix, you observe an unidentified star bearing 050°T, at an observed altitude (Ho) of 45°00.0'. Your DR position at the time of the sight is LAT 27°23.0'N, LONG 39°42.0' W. The chronometer time of the sight is 08h 22m 15s, and the chronometer error is 01m 45s fast. Your vessel is steaming on a course of 300°T at a speed of 18 knots. What star did you observe?Not learned 15. At 0600 zone time, on 16 March your DR position is LAT 20°10.0'N, LONG 81°30.0'W. You are steering course 300°T. The speed over the ground is 10 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1130 running fix. Zone Time GHA Observed Declination Altitude 0800 12°50.0' 19°00.0' S 01°38.8' 1030 50°20.4' 51°42.0' S 01°36.5' 1130 65°20.5' 62°11.5' S 01°35.5'Not learned 16. At 0600 ZT on 24 July your DR position is LAT 22°37'N, LONG 32°45'W. You are steering 185°T at a speed of 20.0 knots. Determine the computed altitude (Hc) and azimuth (Zn) for an observation of the Sun's lower limb taken at 1030 ZT. At this time the chronometer reads 00h 30m 16s and is 0m 31s slow.Not learned 17. Your 0745 ZT 15 July position is LAT 29°04.0'N, LONG 71°17.5'W. You are on course 165°T, and your speed is 8.0 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1130 running fix?Not learned 18. At 0800 ZT on 29 June your DR position is LAT 26°00.0'N, LONG 75°29.5'W. Given a chronometer time of 01h 00m 00s, determine the computed altitude (Hc) of the Sun for the assumed position nearest to the above given latitude and longitude.Not learned 19. Your 0830 DR position is LAT 27°33'S, LONG 79°17'E. Your vessel is on a course of 066°T, at a speed of 19.5 knots. Determine the time of LAN on 10 December.Not learned 20. Your 0900 DR position is LAT 23°16'N, LONG 146°12'E. Your vessel is on a course of 286°T, at a speed of 14.5 knots. Determine the zone time of LAN on 14 March.Not learned 21. At 0900 zone time on 23 September your DR position is LAT 28° 48.0' N, LONG 153° 11.5' W. You are steering course 257° T at a speed of 18.0 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1020 running fix. Zone Time GHA Observed Altitude Declination 0915 110°44.9' 40°01.9' S 0°15.8' 0950 119°27.4' 46°22.9' S 0°16.3' 1020 127°00.9' 51°21.7' S 0°16.8'Not learned 22. On 1 April at 0515 zone time, morning stars were observed, and the vessel's position was determined to be LAT 27° 05.0' N, LONG 16° 30.0' W. Your vessel is steaming at 19.0 knots on a course of 022° T. A sextant observation of the Sun's lower limb is made at 0930 zone time. The chronometer reads 10h 28m 25s, and the sextant altitude is 46° 20.3'. The index error is 4.5' off the arc, and the chronometer error is 02m 15s slow. Your height of eye on the bridge is 57.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 23. On 1 December your 1600 ZT DR position is LAT 22°48.0'S, LONG 91°26.0'E. You are on course 327°T at a speed of 16 knots. What will be the zone time of sunset at your vessel?Not learned 24. On 1 July your 0515 zone time fix gives you a position of LAT 23°24.0'S, LONG 151°42.0'W. Your vessel is on course 240°T, and your speed is 10.0 knots. Local apparent noon (LAN) occurs at 1215 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 42°55.0'. What is the latitude at 1200 ZT?Not learned 25. On 1 July your 0515 ZT fix gives you a position of LAT 24°36.0'S, LONG 151°42.0'W. Your vessel is on course 300°T, and your speed is 10.0 knots. Local apparent noon (LAN) occurs at 1215 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 42°55.0'. What is the calculated latitude at LAN?Not learned 26. On 1 March your 2135 zone time DR position is LAT 23°54.0' N, LONG 63°22.0' W. At that time, you observe Schedar bearing 328°psc. The chronometer reads 01h 35m 16s, and the chronometer error is 00m 07s slow. The variation is 3.5°E. What is the deviation of the standard compass?Not learned 27. On 1 November your 1600 zone time DR position is LAT 27°48'S, LONG 91°26'E. Your vessel is on a course of 327°T at a speed of 16 knots. What will be the zone time of sunset at your vessel?Not learned 28. On 1 October you determine the zone time of evening twilight will be 1835. Your DR position will be LAT 27°18.0'N, LONG 48°52.0'W. Considering their magnitude and location, which group of three stars are best suited to be used in obtaining a fix at star time?Not learned 29. On 1 September your 1115 zone time DR position is LAT 25°20.0'N, LONG 28°24.0'W. At that time, you observe the Sun bearing 160.5°psc. The chronometer reads 01h 14m 58s, and the chronometer error is 01m 17s fast. The variation is 13.5°W. What is the deviation of the standard compass?Not learned 30. On 10 April, your 1630 ZT DR position is LAT 21°03.0'N, LONG 63°11.0'W. You are on course 324°T at a speed of 22 knots. What will be the zone time of sunset at your vessel?Not learned 31. On 10 August your 0430 ZT position is LAT 29° 56.7' S, LONG 139° 11.0' E. Your course is 321° T, speed 18.2 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0500 running fix. OBSERVED STAR TIME GHA DECLINATION ALTITUDE -------------------- ------- --------------- --------------- ----------- Fomalhaut 0452 272° 03.3' S 29° 43.1' 46° 05.3' Canopus 0459 162° 05.5' S 52° 41.0' 41° 48.9' Achernar 0510 236° 28.2' S 57° 19.6' 60° 26.5'Not learned 32. On 10 August your vessel's 0426 zone time DR position is LAT 52°07'N, LONG 142°16'E, when an amplitude of the Sun is observed. The Sun's lower limb is about 20 minutes of arc above the visible horizon and bears 074.5° per standard compass. Variation in the area is 12°W. The chronometer reads 07h 24m 19s and is 02m 34s fast. Which of the following is the deviation of the standard compass?Not learned 33. On 10 December your 1300 zone time (ZT) DR position is LAT 26° 27.0' S, LONG 79° 04.0' E. You are on course 068° T at a speed of 14 knots. What will be the zone time of sunset at your vessel?Not learned 34. On 10 February in DR position LAT 25°32.0'N, LONG 135°15.0'E, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 109°psc. The chronometer reads 09h 43m 25s and is 03m 20s fast. Variation in the area is 4.5°W. What is the deviation of the standard magnetic compass?Not learned 35. On 10 January at 0550 ZT, morning stars were observed, and the vessel's position was determined to be LAT 25° 16.0' N, LONG 123° 18.0' W. Your vessel is steaming at 22.0 knots on a course of 295° T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 05h 14m 02s, and the sextant altitude is 24° 00.7'. The index error is 2.6' off the arc, and the chronometer error is 01m 34s slow. Your height of eye on the bridge is 55.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 36. On 10 July your 0930 zone time DR position is LAT 26°31.0'S, LONG 4°41.0'E. Your vessel is on course 308°T at a speed of 22.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 37. On 10 June your 1712 zone time DR position is LAT 25°10.0' S, LONG 06°58.0' E. You are on course 213°T at a speed of 9.0 knots. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?Not learned 38. On 10 June your 2010 zone time DR position is LAT 41° 10.0' N, LONG 61° 15.0' W. At that time, you observe Polaris with a sextant altitude (hs) of 40° 35.8'. The chronometer time of the sight is 00h 08m 18s, and the chronometer error is 01m 54s slow. The index error is 2.0' on the arc, and the height of eye is 40 feet. What is your latitude by Polaris?Not learned 39. On 10 June your vessel's 0519 zone time DR position is LAT 27°07.0'N, LONG 92°10.0'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 063.6° per standard magnetic compass. The variation in the area is 4.8°E. The chronometer reads 11h 17m 32s and is 01m 18s slow. What is the deviation of the compass?Not learned 40. On 10 March in DR position LAT 21°42.0'S, LONG 57°28.0'E, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 08h 28m 17s, and the chronometer error is 00m 00s. The sextant altitude (hs) is 72°08.0'. The index error is 3.4' on the arc, and your height of eye is 52.7 feet. What is the latitude at meridian transit?Not learned 41. On 10 November your 1630 zone time DR position is LAT 25°10.0'N, LONG 71°12.0'W. You are on course 335°T at a speed of 24 knots. What will be the zone time of sunset at your vessel?Not learned 42. On 10 October your 0930 zone time position is LAT 25° 00.0' S, LONG 164° 38.6' W. Your vessel is on course 180° T at a speed to 10.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 43. On 10 October your 1500 zone time DR position is LAT 27°35.6' S, LONG 44°49.0' W. You are on course 342°T at a speed of 24 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 44. At 1000 ZT 21 October your DR position is LAT 29°00'N, LONG 134°40'E. Determine the computed altitude (Hc) of the Sun for the assumed position nearest to the above given latitude and longitude, given a chronometer time of 01h 00m 00s.Not learned 45. On 11 December your 1816 ZT DR position is LAT 26° 30.0' N, LONG 140° 35.0' E. At that time, you observe Venus bearing 230° pgc. The chronometer reads 09h 14m 52s and the chronometer error is 01m 02s slow. The variation is 3.5° E. What is the gyro error?Not learned 46. On 11 February your 1832 zone time DR position is LONG 110°52.6'W. At that time you observe Polaris with a sextant altitude (hs) of 26°19.8'. The chronometer time of the sight is 01h 34m 56s, and the chronometer error is 02m 16s fast. The index error is 2.7' off the arc, and the height of eye is 60.2 feet. What is your latitude by Polaris?Not learned 47. On 11 January your 0450 ZT position is LAT 38°42'N, LONG 14°16'W. You observe Polaris bearing 358.5°pgc. At the time of the observation the helmsman noted that he was heading 160°pgc and 173°psc. The variation is 9°W. What is the deviation for that heading?Not learned 48. On 11 January your vessel's 0655 zone time DR position is LAT 24°30'N, LONG 122°02'W, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 101.0° per standard compass. Variation in the area is 11.6°E. The chronometer reads 02h 52m 48s and is 02m 12s slow. What is the deviation of the standard compass?Not learned 49. On 11 July your 0240 ZT position is LAT 14° 52' N, LONG 34° 23' W. You observe Polaris bearing 359.8° pgc. At the time of the observation the helmsman noted that he was heading 279° pgc and 299° psc. The variation is 19° W. What is the deviation for that heading?Not learned 50. On 11 March your 1846 zone time DR position is LAT 25° 05.7' N, LONG 124° 29.0' W. At that time you observe Polaris with a sextant altitude (hs) of 25° 59.1'. The chronometer time of the sight is 02h 44m 01s, and the chronometer error is 02m 15s slow. The index error is 3.9' on the arc, and the height of eye is 42.7 feet (13.0 meters). What is your latitude by Polaris?Not learned 51. On 11 May in DR position LAT 28°13.7'N, LONG 168°36.3'E, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 283°psc. The chronometer reads 07h 13m 19s and is 02m 56s slow. Variation in the area is 13°E. What is the deviation of the standard magnetic compass?Not learned 52. On 11 May in DR position LAT 37° 06.0' N, LONG 45° 45.0' W you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 089.0° psc. The chronometer reads 07h 57m 06s and is 01m 48s slow. Variation in the area is 20.0° W. What is the deviationNot learned 53. On 11 May your vessel's 1839 ZT position is LAT 17°30'N, LONG 63°55'W, when an amplitude of the Sun's center is observed on the celestial horizon bearing 301° per standard magnetic compass. Variation for this area is 10.5°W. The chronometer reads 10h 37m 10s and is 02m 08s slow. What is the deviation of the compass?Not learned 54. On 11 November your 0200 zone time DR position is LAT 26°32' S, LONG 154°16' E. You are on course 058°T at a speed of 21 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 55. On 11 November your 0730 zone time position was LAT 19° 58.0' N, LONG 143° 54.0' W. Your vessel was steaming on course 084° T at a speed of 15.0 knots. An observation of the Sun's lower limb was made at 0931 ZT. The chronometer read 07h 29m 22s and was slow 02m 22s. The observed altitude (Ho) was 44° 17.6'. LAN occurred at 1125 zone time (ZD +10). The observed altitude (Ho) was 52° 17.4'. What was the longitude of your 1200 zone time running fix?Not learned 56. On 11 October at 0516 ZT, morning stars were observed, and the vessel's position was determined to be LAT 23° 21.0' N, LONG 139° 27.0' W. Your vessel is steaming at 14.0 knots on a course of 293° T. A sextant observation of the Sun's lower limb is made at 0927 ZT. The chronometer reads 06h 30m 21s, and the sextant altitude (hs) is 39° 48.7'. The index error is 2.0' on the arc, and the chronometer error is 02m 56s fast. Your height of eye on the bridge is 63.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 57. On 12 April at 0515 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°05'S, LONG 16°30'W. Your vessel is steaming at 19 knots on a course of 278°T. A sextant observation of the Sun's lower limb is made at 0930 ZT. The chronometer reads 10h 28m 25s, and the sextant altitude (hs) is 40°15.9'. The index error is 2.5' off the arc, and the chronometer error is 2m 15s slow. Your height of eye on the bridge is 57 feet. What is the azimuth (Zn) and intercept (a) based on the assumed position of this sight?Not learned 58. On 12 December your 1830 ZT DR position is LAT 24°16.0' S, LONG 41°18.0' W. You are on course 235°T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1930 running fix. Body Zone Time GHA Observed Declination Altitude Rigel 1845 329°19.7' 19°54.7'' S 8°13.4' Peacock 1910 107°58.4' 32°43.9'' S 56°47.8' Markab 1930 73°04.1' 39°53.1' N 15°06.5'Not learned 59. On 12 February your 0542 zone time (ZT) fix gives you a position of LAT 26° 42.0' N, LONG 60° 18.0' W. Your vessel is on course 300° T, and your speed is 9.8 knots. Local apparent noon (LAN) occurs at 1220 ZT at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 49° 10.0'. What is the calculated latitude at LAN?Not learned 60. On 12 February your 0900 zone time DR position is LAT 16° 43.0' N, LONG 51° 42.0' W. Your vessel is on course 093° T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)?Not learned 61. On 12 February your 0930 zone time DR position is LAT 25° 20.0' N, LONG 30° 40.0' W. Your vessel is on course 135° T at a speed of 11.2 knots. What is the zone time of local apparent noon (LAN)?Not learned 62. On 12 July your 0800 ZT DR position is LAT 24° 15.0' N, LONG 132° 30.0' W. Your vessel is on course 045° T at a speed of 15.0 knots. What is the ZT of local apparent noon (LAN)?Not learned 63. On 12 June your 0400 ZT DR position is LAT 22°31.0'N, LONG 31°45.0'W. You are on course 240°T at a speed of 16.5 knots. What will be the zone time of sunrise at your vessel?Not learned 64. On 12 June at 0919 zone time, your position is LAT 26°52'N, LONG 84°34'W. The chronometer reads 03h 17m 00s. Chronometer error is 01m 40s slow. At that time, an azimuth of the Sun is obtained. The bearing is 089.5° per standard magnetic compass. Variation for this area is 4.5°E. What is the deviation of the standard magnetic compass?Not learned 65. On 12 June your 1845 DR position is LAT 21°47'N, LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 019.0°T at a sextant altitude (hs) of 53°56.2'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?Not learned 66. On 12 June your 1845 DR position is LAT 21° 47' N, LONG 46° 52' W when you observe a faint unidentifiable star through a break in the clouds. The star bears 031° T at a sextant altitude (hs) of 70° 10.3'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?Not learned 67. On 12 June your 1845 DR position is LAT 21° 47' N, LONG 46° 52' W when you observe a faint unidentifiable star through a break in the clouds. The star bears 162° T at a sextant altitude (hs) of 28° 36.5'. The index error is 0.5'on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?Not learned 68. On 12 June your 1845 DR position is LAT 21° 47' N, LONG 46° 52' W when you observe a faint unidentifiable star through a break in the clouds. The star bears 174.0° T at a sextant altitude (hs) of 18° 58.6'. The index error is 0.5'on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?Not learned 69. On 12 June your 1845 DR position is LAT 21°47'N, LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 270°T at a sextant altitude (hs) of 65°41.7'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?Not learned 70. On 12 June your 1845 DR position is LAT 21° 47' N, LONG 46° 52' W when you observe a faint unidentifiable star through a break in the clouds. The star bears 282.5° T at a sextant altitude (hs) of 14° 22.3'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?Not learned 71. On 12 June your 1845 DR position is LAT 21° 47' N, LONG 46° 52' W when you observe a faint unidentifiable star through a break in the clouds. The star bears 313° T at a sextant altitude (hs) of 14° 56.3'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?Not learned 72. On 12 June your 1945 DR position is LAT 21°47.0'N, LONG 46°52.0'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 130°T at a sextant altitude (hs) of 45°21.2'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 10h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?Not learned 73. On 12 March your 1846 zone time DR position is LONG 129°16.5'W. At that time you observe Polaris with a sextant altitude (hs) of 28°01.5'. The chronometer time of the sight is 03h 44m 10s, and the chronometer error is 01m 55s slow. The index error is 2.2' off the arc, and the height of eye is 59.8 feet (18.2 m). What is your latitude by Polaris?Not learned 74. On 12 October your vessel is on course 081° T, speed 20 knots. Your 1800 zone time DR position is LAT 26° 11.0' S, LONG 77° 18.0' E. You observed 3 celestial bodies. Determine the latitude and longitude of your 1835 running fix. ZONE BODY's BODY's OBSERVED STAR TIME GHA DECLINATION ALTITUDE (Ho) -------------------- ------- --------------- --------------- ----------- Vega 1810 299° 26.6' N 38° 46.3' 23° 08.7' Fomalhaut 1823 237° 37.0' S 29° 43.2' 50° 23.9' Antares 1835 337° 43.4' S 26° 23.4' 40° 53.1'Not learned 75. On 12 September your 0600 zone time (ZT) fix gives you a position of LAT 22°51.9'N, LONG 133°40.1'W. Your vessel is on course 062°T, and your speed is 12.3 knots. Local apparent noon (LAN) occurs at 1142 ZT, at which time a meridian altitude of the Sun's upper limb is observed. The observed altitude (Ho) for this sight is 70°33.2'. What is the calculated latitude at LAN?Not learned 76. On 12 September your 0736 zone time DR position is LAT 28°34.0'S, LONG 174°49.0'E. At that time, you observe the Sun bearing 084° per standard magnetic compass (psc). The chronometer reads 07h 38m 11s, and the chronometer error is 01m 46s fast. The variation is 11°W. What is the deviation of the standard magnetic compass?Not learned 77. On 13 August your 0345 ZT DR position is LAT 21°35.0'N, LONG 135°26.0'W. You are on course 052°T at a speed of 14 knots. What will be the zone time of sunrise at your vessel?Not learned 78. On 13 February at 0325 zone time, your DR position is LAT 23°20'N, LONG 155°15'W. You are steering 240°T at a speed of 13.6 knots. What is the zone time of sunrise?Not learned 79. On 13 June your 0445 DR position is LAT 20° 12.0' N, LONG 44° 45.0' W. You observe an unidentified star bearing 168° T at an observed altitude (Ho) of 38° 56.0'. The chronometer reads 07h 43m 20s, and is 01m 39s slow. Which star did you observe?Not learned 80. On 13 November at 0438 ZT, morning stars were observed and the vessel's position was determined to be LAT 22° 14.0' S, LONG 79° 23.0' E. Your vessel is steaming at 13.0 knots on a course of 242° T. A sextant observation of the Sun's lower limb is made at 0822 ZT. The chronometer reads 03h 20m 16s, and the sextant altitude (hs) is 45° 49.7'. The index error is 1.0' on the arc, and the chronometer error is 01m 47s slow. Your height of eye on the bridge is 61.0 feet (18.6 meters). What is the azimuth (Zn) of this sight using the assumed position?Not learned 81. On 13 November your 1030 ZT DR position is LAT 19° 03' S, LONG 6° 34' E. You are on course 164° T, speed 12 knots. Determine your 1200 position using the following observations of the Sun. ZONE TIME GHA DECLINATION Ho 1112 351° 55.4' S 18° 00.4' 88° 08.0' 1121 354° 10.4' S 18° 00.5' 88° 33.9'Not learned 82. On 13 October your 0515 zone time fix gives you a position of LAT 26°53.0'N, LONG 90°05.0'W. Your vessel is on course 068°T, and your speed is 7.8 knots. Local apparent noon (LAN) occurs at 1145 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 54°51.5'. What is the latitude at 1200 ZT?Not learned 83. On 13 October your 0515 zone time (ZT) fix gives you a position of LAT 26°53.0'N, LONG 90°05.0'W. Your vessel is on course 068°T, and your speed is 7.8 knots. Local apparent noon (LAN) occurs at 1145 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 54°51.5'. What is the calculated latitude at LAN?Not learned 84. On 13 October at 1847 ZT, your vessel's DR position is LAT 42°17.4' N, LONG 138°46.2' W. At approximately this time, you obtain a sextant altitude (hs) of Polaris reading 42°16.8', with an index error of 3.2' on the arc. Your chronometer reads 03h 45m 20s and is 1m 32s slow. What is your latitude by Polaris, given a height of eye of 44 feet?Not learned 85. On 13 October your vessel's 1722 zone time DR position is LAT 27°36'S, LONG 136°16'E, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 266° per standard magnetic compass. Variation in the area is 2°W. The chronometer reads 08h 24m 19s and is 01m 43s fast. What is the deviation of the standard magnetic compass?Not learned 86. On 13 September your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E when you observe a faint unidentifiable star through a hole in the clouds. The star bore 132.3°T at a sextant altitude (hs) of 29°34.6'. The chronometer read 11h 24m 39s and is 5m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe?Not learned 87. On 13 September your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E, when you observed a faint unidentifiable star through a hole in the clouds. The star bore 148.0°T at a sextant altitude (hs) of 32°24.3'. The chronometer read 11h 24m 39s and is 05m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe?Not learned 88. On 13 September your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E when you observed a faint unidentifiable star through a hole in the clouds. The star bore 265.0°T at a sextant altitude (hs) of 62°25.4'. The chronometer read 11h 24m 39s and is 5m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe?Not learned 89. On 13 September your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E when you observed a faint unidentifiable star through a hole in the clouds. The star bore 351.5°T at a sextant altitude (hs) of 62°05.6'. The chronometer read 11h 24m 39s and is 5m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe?Not learned 90. At 1300 ZT on 9 May your DR position is LAT 24° 00' N, LONG 83° 26' W. Determine the computed altitude (Hc) of the Sun for the assumed position nearest to the above given latitude and longitude, given a chronometer time of 07h 00m 00s.Not learned 91. At 1318 ZT on 10 September, in DR position LAT 24° 05.8' N, LONG 058° 08.3' E, you observe an amplitude of the Moon. The upper limb of the Moon is on the visible horizon and bears 254° psc. Variation is 2° W. What is the deviation?Not learned 92. At 1337 ZT on July 17, in DR position LAT 30° 56.8' S, LONG 039° 36.5' W, you observe an amplitude of the Moon. The upper limb of the moon is on the visible horizon, bearing 263.0° psc. The variation is 20° W. What is the deviation?Not learned 93. On 14 January your 0550 ZT DR position is LAT 25°26.0' N, LONG 38°16.0' W. You observe an unidentified star bearing 004.5°T, at an observed altitude (Ho) of 40°10.0'. The chronometer reads 08h 48m 51s and is 01m 22s slow. What star did you observe?Not learned 94. On 14 January your 0746 zone time DR position is LAT 26°37.0'N, LONG 153°19.0'W. At that time, you observe the Sun bearing 123°psc. The chronometer reads 05h 49m 16s, and the chronometer error is 02m 29s fast. The variation is 3°W. What is the deviation of the standard magnetic compass?Not learned 95. On 14 January your 1922 DR position is LAT 27° 18.5' S, LONG 67° 18.0' E. You observe an unidentified star bearing 295° T at an observed altitude (Ho) of 13° 50.7'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?Not learned 96. On 14 March at 1845 ZT, you take a sextant observation of Polaris. Your DR position is LAT 29°10'N, LONG 154°30'W, and your sextant reads 29°53.5'. Your chronometer reads 04h 42m 36s, and the chronometer error is 02m 24s slow. Your height of eye is 24 feet, and the index error is 1.3' off the arc. Determine the latitude by Polaris.Not learned 97. On 14 March your 1846 ZT DR position is LAT 21°57.6' N, LONG 132°16.2' W. At that time, you observe Polaris with a sextant altitude (hs) of 22°16.8'. The chronometer time of the sight is 03h 45m 10s, and the chronometer error is 01m 32s slow. The index error is 3.2' off the arc, and the height of eye is 44.9 feet. What is your latitude by Polaris?Not learned 98. On 14 October your 0800 zone time (ZT) dead reckoning position is LAT 28°22.0'N, LONG 161°17.0'E. Your vessel is on course 116°T at a speed of 17.5 knots. What is the ZT of local apparent noon (LAN)?Not learned 99. On 14 September your 1810 ZT DR position is LAT 27° 12.0' S, LONG 71° 10.0' E. You are on course 060° T at a speed of 15.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1822 running fix. ZONE OBSERVED BODY TIME GHA ALTITUDE (Ho) DECLINATION ------------------- -------- ------------- ------------ --------------- Venus 1810 341° 30.4' 38° 48.9' S 12° 48.1' Altair 1816 255° 00.4' 41° 20.3' N 8° 49.3' Peacock 1822 247° 55.8' 48° 39.5' S 56° 47.8'Not learned 100. At 1400 zone time on 11 April, your DR position is LAT 25° 40' N, LONG 91° 00' W. You are steering 180° T at a speed of 10.0 knots. What is your zone time of sunset?Not learned 101. At 1430 ZT on 16 April, in DR position LAT 34° 03.8' N, LONG 061° 02.5' W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 095.2° psc. The variation is 12° W. What is the deviation?Not learned 102. At 1435 ZT on 27 April, in DR position LAT 51° 56.8' N, LONG 150° 37.7' E, the Moon's upper limb is observed on the visible horizon, bearing 242.2° psc. Variation is 2° W. What is the deviation?Not learned 103. At 1444 ZT on 28 July, in DR position LAT 40° 56.8' N, LONG 167° 12.4' E, you observe an amplitude of the Moon. The upper limb of the Moon is on the visible horizon and bears 299.3° psc. The variation is 1° E. What is the deviation?Not learned 104. On 15 August your 0512 zone time position was LAT 29° 18.0' N, LONG 57° 24.0' W. Your vessel was steaming on course 262° T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0824 ZT. The chronometer read 00h 22m 24s and was slow 01m 34s. The observed altitude (Ho) was 38° 16.7'. LAN occurred at 1204 zone time. The observed altitude (Ho) was 74° 58.0'. What was the longitude of your 1204 zone time running fix?Not learned 105. On 15 August an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1130 ZT. Your DR position is LAT 26° 24.0' S, LONG 155° 02.0' E, and your sextant altitude (hs) is 48° 45.9'. The index error is 2.6' on the arc, and your height of eye is 51.5 feet. The chronometer time of the observation is 01h 27m 38s, and the chronometer error is 02m 14s slow. Find the latitude at meridian transit from the ex-meridian observation.Not learned 106. On 15 August your vessel is enroute from Bombay, India, to San Francisco, CA. You are steering course 020° T and making a speed of 20.0 knots. Your 1830 zone time DR is LAT 26° 13.0' N, LONG 135° 18.0' W. You observed 3 celestial bodies. Determine the latitude and longitude of your 1935 running fix. ZONE BODY's BODY's OBSERVED STAR TIME GHA DECLINATION ALTITUDE (Ho) -------------------- ------- --------------- --------------- ----------- Spica 1848 180° 24.3' S 11° 03.8' 32° 21.4' Altair 1910 89° 29.8' N 8° 49.3' 43° 06.3' Kochab 1935 170° 33.4' N 74° 14.3' 39° 12.0'Not learned 107. On 15 December in DR position LAT 23°24.0'N, LONG 55°36.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 03h 45m 19s, and the chronometer error is 00m 00s. The sextant altitude (hs) is 43°02.3'. The index error is 2.6' on the arc, and your height of eye is 65.0 feet. What is the latitude at meridian transit?Not learned 108. On 15 February at 0610 ZT, in DR position LAT 56°53.0'N, LONG 157°02.9'E, you observe Polaris at a sextant altitude (hs) of 56°10.4'. The index error is 2.5' on the arc, and the height of eye is 18 meters. What is the latitude?Not learned 109. On 15 July at 0447 ZT, your vessel's DR position is LAT 22°42' N, LONG 126°36' E. At approximately this time, you obtain a sextant altitude (hs) of Polaris reading 23°46.2' with an index error of 1.6' off the arc. Your chronometer reads 08h 48m 28s, and is 1m 16s fast. What is your latitude by Polaris, given a height of eye of 33 feet?Not learned 110. On 15 July in DR position LAT 22°19.0'N, LONG 154°37.0'W, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 298°psc. The chronometer reads 04h 45m 19s and is 01m 56s slow. Variation in the area is 7.5°W. What is the deviation of the standard magnetic compass?Not learned 111. On 15 July your vessel is enroute from Portland, OR, to Singapore, Malaysia. You are steering course 243°T and making a speed of 16 knots. Your 1845 zone time DR is LAT 27°42.0'N, LONG 167°02.0'E. You observed 3 celestial bodies. Determine the latitude and longitude of your 1945 running fix.Not learned 112. On 15 March in DR position LAT 21°42.0'N, LONG 55°26.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 04h 02m 40s, and the chronometer error is 02m 24s fast. The sextant altitude (hs) is 66°15.6'. The index error is 2.8' on the arc, and your height of eye is 56 feet. What is the latitude at meridian transit?Not learned 113. On 15 November your 0813 zone time (ZT) fix gives you a position of LAT 22°30.0'N, LONG 67°28.0'W. Your vessel is on course 164°T, and your speed is 13.5 knots. Local apparent noon (LAN) occurs at 1215 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 49°46.0'. What is the latitude at 1200 ZT?Not learned 114. On 15 November your 0913 zone time fix gives you a position of LAT 22°30.0'N, LONG 68°28.0'W. Your vessel is on course 164°T, and your speed is 13.5 knots. Local apparent noon (LAN) occurs at 1118 zone time at which time meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 49°46.0'. What is the calculated latitude at LAN?Not learned 115. On 15 November your 1030 ZT DR position is LAT 17°25'S, LONG 42°12'W. You are on course 059°T, speed 22 knots. Determine your 1200 position using the following observations of the Sun.Not learned 116. On 15 November your 1030 ZT DR position is LAT 19°41'S, LONG 41°37'W. You are on course 239°T, speed 22 knots. Determine your 1200 position using the following observations of the Sun.Not learned 117. On 15 October your 0300 zone time DR position is LAT 27° 14' S, LONG 99° 46' E. You are on course 128° T at a speed of 19 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 118. On 15 October your 0325 zone time DR position is LAT 26° 51.0' N, LONG 138° 17.0' W. At that time, you observe Canopus bearing 167° pgc. The chronometer reads 00h 25m 36s, and the chronometer error is 00m 20s slow. The variation is 2° E. What is the gyro error?Not learned 119. On 15 October an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1146 ZT. Your DR position is LAT 22°42.0'N, LONG 139°52.0'E, and your sextant altitude (hs) is 58°30.4'. The index error is 3.4' on the arc, and your height of eye is 56.7 feet. The chronometer time of the observation is 02h 45m 06s, and the chronometer error is 01m 06s slow. Find the latitude at meridian transit from the ex-meridian observation.Not learned 120. At 1502 ZT on 4 August, in DR position LAT 11° 21.6' S, LONG 088° 14.3' E, you observe an amplitude of the Moon. The upper limb of the Moon is on the visible horizon and bears 289° psc. The variation is 15° W. What is the deviation?Not learned 121. At 1523 ZT on 14 June, in DR position LAT 31° 58' S, LONG 48° 42' W you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 118.0° psc. The variation is 10° W. What is the deviation?Not learned 122. At 1524 ZT on 14 June, in DR position LAT 30° 51' N, LONG 30° 02' W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 103.9° pgc. The variation is 10° W. What is the gyro error?Not learned 123. At 1538 ZT on 15 October, in DR position LAT 18° 12.8' S, LONG 160° 48.4' E, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 276.2° psc. Variation is 10° E. What is the deviation?Not learned 124. At 1542 ZT on 23 October, in DR position LAT 37° 28.5' N, LONG 156° 17.3' E, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 282.5° psc. The variation is 0.0°. What is the deviation?Not learned 125. At 1544 zone time on 5 October your DR position is LAT 25° 00' N, LONG 60° 15' W. You are steering 270° T at a speed of 6.8 knots. What is the zone time of sunset?Not learned 126. At 1547 ZT on 22 May, in DR position LAT 45° 12.8' N, LONG 028° 15.4' W, the Moon's upper limb is observed on the visible horizon, bearing 120.0° psc. Variation is 2° W. What is the deviation?Not learned 127. On 16 April your 0200 zone time DR position is LAT 17°18'S, LONG 168°46'E. You are on course 236°T at a speed of 16 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.Not learned 128. On 16 April in DR position LAT 28° 07.0' N, LONG 81° 47.0' W, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 073.5° psc. The chronometer reads 10h 53m 41s and is 02m 23s slow. Variation in the area is 11° E. What is the deviation of the magnetic compass?Not learned 129. On 16 August your 1600 ZT DR position is LAT 26°17.0'N, LONG 165°17.0'E. You are on course 301°T at a speed of 15 knots. What will be the zone time of sunset at your vessel?Not learned 130. On 16 December your 1810 zone time DR position is LONG 129°46.5'W. At that time, you observe Polaris with a sextant altitude (hs) of 23°56.8'. The chronometer time of the sight is 03h 12m 31s, and the chronometer error is 02m 16s fast. The index error is 2.5' off the arc, and the height of eye is 52.6 feet. What is your latitude by Polaris?Not learned 131. On 16 February your 0300 ZT DR position is LAT 28°32.0'S, LONG 176°49.0'E. You are on course 082°T at a speed of 21 knots. What will be the zone time of sunrise at your vessel?Not learned 132. On 16 February your 0640 zone time (ZT) position was LAT 23°46.0'N, LONG 156°24.0'W. Your vessel was steaming on course 222°T at a speed of 18.0 knots. An observation of the Sun's lower limb was made at 0910 ZT. The chronometer read 07h 08m 06s and was slow 01m 56s. The observed altitude (Ho) was 27°15.8'. LAN occurred at 1245 ZT (ZD +10). The observed altitude (Ho) was 55°25.3'. What was the longitude of your 1245 ZT running fix?Not learned 133. On 16 February your 1845 ZT DR position is LAT 25°50.5'N, LONG 46°24.0'W. At that time, you observe Polaris with a sextant altitude (hs) of 26°25.5'. The chronometer time of the sight is 09h 47m 30s and the chronometer error is 02m 16s fast. The index error is 2.5' off the arc, and the height of eye is 55.0 feet. What is your latitude by Polaris?Not learned 134. On 16 January your 0930 ZT DR position is LAT 26°07.0'S, LONG 51°43.0'E. Your vessel is on course 238°T at a speed of 17.0 knots. What is the ZT of local apparent noon (LAN)?Not learned 135. On 16 January at 1804 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 36°12' N, LONG 124°36' W, and your sextant reads (hs) 37°16.4'. Your chronometer reads 02h 02m 12s, and is 01m 36s slow. Your height of eye is 60 feet, and the index error is 1.5' on the arc. From your observation of Polaris, what is the latitude of your vessel?Not learned 136. On 16 July your 1810 zone time DR position is LAT 24°16.5' S, LONG 162°52.0' E. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 137. On 16 July your 1920 ZT DR position is LAT 25° 36.0' N, LONG 172° 18.9' W. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 138. On 16 July at 2000 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 27°22.0'N, LONG 148°35.0'W, and your sextant reads 26°57.5'. Your chronometer reads 05h 59m 16s, and your chronometer error is 01m 28s slow. Your height of eye is 48 feet, and the index error for your sextant is 1.3' off the arc. What is the latitude of your vessel from your observation of Polaris?Not learned 139. On 16 June your 0430 zone time DR position is LAT 29° 24.0' S, LONG 36° 16.0' E. At that time, you observe Vega bearing 341.0° psc. The chronometer reads 02h 32m 06s, and the chronometer error is 01m 54s fast. The variation is 20.5° W. What is the deviation?Not learned 140. On 16 June 0612 zone time, morning stars were observed. The vessel's position was LAT 27° 23.0' S, LONG 56° 22.0' W. The vessel is steaming at 16.0 knots on a course of 212° T. A sextant observation of the Sun's lower limb is made at 0850 zone time. The chronometer reads 00h 53m 19s, and the sextant altitude is 22° 58.6'. The index error is 2.0' off the arc, and the chronometer error is 02m 43s fast. Your height of eye is 61.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 141. On 16 June in DR position LAT 50°57.0'S, LONG 53°03.9'W (ZD+4), you take an ex-meridian observation of Acrux at lower transit. The chronometer time of the sight is 10h 08m 18s, and the chronometer error is 02m 12s fast. The sextant altitude (hs) is 23°49.0'. The index error is 1.1' off the arc, and your height of eye is 26 feet. What is the latitude at meridian transit?Not learned 142. On 16 March your 0330 ZT DR position is LAT 22° 36.0' S, LONG 76° 16.0' E. You are on course 098° T at a speed of 16 knots. What will be the ZT of sunrise at your vessel?Not learned 143. On 16 November your 0800 zone time DR position is LAT 25°11.0'N, LONG 117°41.0'W. Your vessel is on course 252°T at a speed of 14.5 knots. What is the zone time of local apparent noon (LAN)?Not learned 144. On 16 November your 1200 ZT DR position is LAT 26° 48.0' S, LONG 124° 32.0' W. Your vessel is on course 078° T, speed 17.0 knots. You observe an ex-meridian of the Sun's lower limb. The sextant (hs) reads 81° 41.3'. The index error is 1.5' off the arc, and your height of eye is 56 feet. The chronometer time of the observation is 08h 15m 32s, and the chronometer is 03m 06s fast. What is your latitude at meridian transit?Not learned 145. On 16 October evening twilight will occur at 1746 ZT. Your DR position will be LAT 28° 43.2' N, LONG 60° 29.8' W. Considering their magnitude and location, which of the following are the three best stars to select for a fix at star time?Not learned 146. On 16 September your 0600 ZT fix gives you a position of LAT 29°47.2'N, LONG 65°28.4'W. Your vessel is on course 242°T and your speed is 13.5 knots. Local apparent noon (LAN) occurs at 1227 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 63°25.3'. What is the calculated latitude at LAN?Not learned 147. On 16 September your vessel's 0736 zone time DR position is LAT 27° 34' S, LONG 174° 49' E, when an azimuth of the Sun is observed. The chronometer time of the sight is 07h 38m 11s, and the Sun is bearing 079.8° per gyrocompass. The chronometer error is 01m 46s fast, and the variation in the area is 11.0° W. At the time of the sight, the helmsman reports that he was heading 252° pgc and 258° per magnetic compass. What is the deviation of the magnetic compass?Not learned 148. At 1610 ZT on 14 August, in DR position LAT 33° 24.6' S, LONG 028° 15.4' W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 111.0° psc. The variation is 2° E. What is the deviation?Not learned 149. At 1620 ZT on 10 September, in DR position LAT 34° 03.8' N, LONG 050° 28.4' W, you observe an amplitude of the Moon. The Moon's upper limb is observed on the visible horizon and bears 110.2° psc. The variation is 2° E. What is the deviation?Not learned 150. At 1622 ZT on 15 June, in DR position LAT 10° 15.2' N, LONG 135° 10' W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon, bearing 101.2° psc. The variation is 5° E. What is the deviation?Not learned 151. On 17 April your 1516 zone time DR position is LAT 27°24.0'N, LONG 115°24.0'E. At that time, you observe the Sun bearing 247°psc. The chronometer reads 07h 16m 26s, and the chronometer error is 00m 32s slow. The variation is 4.5°E. What is the deviation of the standard compass?Not learned 152. On 17 April your 1610 ZT DR position is LAT 22° 07.0' N, LONG 158° 16.0' W. At that time, you observe the Sun bearing 271° psc. The chronometer reads 03h 08m 52s, and the chronometer error is 01m 16s slow. The variation is 4° E. What is the deviation of the standard magnetic compass?Not learned 153. On 17 April your vessel's 1856 zone time DR position is LAT 22° 35.0' N, LONG 63° 15.0' W. At that time, a sextant observation of the star Sirius is made. The sextant altitude is 42° 45.0' and the chronometer reads 10h 59m 27s. The index error is 2.6' off the arc, and the chronometer error is 03m 01s fast. Your height of eye is determined to be 45 feet. What is the computed altitude (Hc) and azimuth (Zn) for this sight using the assumed position?Not learned 154. On 17 April your vessel is enroute from the Panama Canal to Kobe, Japan. Your 0400 zone time DR position is LAT 26°12.0'N, LONG 126°12.0'W. Your vessel is on course 285°T at a speed of 18 knots. What will be the zone time of sunrise at your vessel?Not learned 155. On 17 April your vessel's position is LAT 21° 00' S, LONG 78° 30' W, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 082.7° per standard magnetic compass. Variation in the area is 2.0° W. The chronometer reads 10h 59m 24s and is 01m 24s fast. What is the deviation of the compass?Not learned 156. On 17 December your 0600 ZT fix gives you a position of LAT 27°16.7'N, LONG 138°39.2'W. Your vessel is on course 137°T, and your speed is 14.8 knots. Local apparent noon (LAN) occurs at 1207 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 40°22.1'. What is the calculated latitude at LAN?Not learned 157. On 17 January your 0730 zone time fix gives you a position of LAT 22°26.0'S, LONG 152°17.0'E. Your vessel is steaming on a course of 116°T at a speed of 17 knots. An observation of the Sun's lower limb is made at 1015 zone time. The chronometer reads 00h 13m 23s, and the chronometer error is 01m 49s slow. The observed altitude (Ho) is 66°02.1'. LAN occurs at 1152 zone time and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) is 87°54.2'. Determine the vessel's 1200 zone time position.Not learned 158. On 17 January your 0730 zone time position was LAT 22° 26.0' N, LONG 152° 17.0' E. Your vessel was steaming on course 136° T at a speed of 17.0 knots. An observation of the Sun's lower limb was made at 1015 ZT. The chronometer read 00h 13m 23s and was slow 01m 49s. The observed altitude (Ho) was 40° 25.7'. LAN occurred at 1222 zone time. The observed altitude (Ho) was 47° 48.1'. What was the longitude of your 1200 zone time running fix?Not learned 159. On 17 July your 1951 zone time DR position is LAT 24°26.0'N, LONG 51°16.0'W. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 160. On 17 June your 0815 zone time DR position is LAT 25°27.0'N, LONG 47°16.0'W. At that time, you observe the Sun bearing 079.5°psc. The chronometer reads 11h 15m 03s, and the chronometer error is 01m 15s fast. The variation is 3°E. What is the deviation of the standard magnetic compass?Not learned 161. On 17 March your 0520 DR position is LAT 27° 23.0' N, LONG 39° 42.0' W. At this time you observe an unidentified star bearing 270° T with an observed altitude of 46° 30.2'. The chronometer reads 08h 22m 15s, and is 01m 45s fast. What star did you observe?Not learned 162. On 17 March your 0800 zone time DR position is LAT 21° 27.0' N, LONG 65° 25.0' W. Your vessel is on course 105° T at a speed of 17.5 knots. What is the zone time of local apparent noon (LAN)?Not learned 163. On 17 March your 1845 DR position is LAT 25°10.0'N, LONG 66°48.0'W. You observe an unidentified star bearing 340°T at an observed altitude (Ho) of 66°25.1'. The chronometer reads 10h 47m 49s, and is 1m 54s fast. What star did you observe?Not learned 164. On 17 May your 0300 ZT DR position is LAT 27°21.0'N, LONG 146°14.0'E. You are on course 107°T at a speed of 18 knots. What will be the zone time of sunrise at your vessel?Not learned 165. On 17 May at 0501 zone time, morning stars were observed, and the vessel's position was determined to be LAT 22°16.0'S, LONG 103°46.0'W. Your vessel is steaming at 24.0 knots on a course of 301°T. A sextant observation of the Sun's lower limb is made at 0845 zone time. The chronometer reads 03h 43m 32s, and the sextant altitude is 28°24.7'. The index error is 1.5' off the arc, and the chronometer error is 02m 02s slow. Your height of eye on the bridge is 85.5 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 166. On 17 May your 1554 zone time DR position is LAT 26° 33.0' N, LONG 65° 46.0' W. At that time, you observe the Sun bearing 269° psc. The chronometer reads 07h 55m 47s, and the chronometer error is 01m 14s fast. The variation is 3° W. What is the deviation of the standard magnetic compass?Not learned 167. On 17 November your 1530 ZT DR position is LAT 27° 13.0' S, LONG 153° 21.0' W. You are on course 261° T at a speed of 14 knots. What will be the ZT of sunset at your vessel?Not learned 168. On 17 November in DR position LAT 01°14.4'S, LONG 148°45.5'E, you take an ex-meridian observation of the planet Venus at upper transit. The chronometer time of the sight is 05h 31m 42s, and the chronometer error is 01m 50s fast. The sextant altitude (hs) is 64°41.1'. The index error is 1.8' off the arc, and your height of eye is 50 feet. What is the latitude at meridian transit?Not learned 169. At 1730 zone time, on 3 March, your DR position is LAT 16°00'S, LONG 80°00'W. You are steering 000°T at a speed of 7.5 knots. What is the zone time of sunset?Not learned 170. On 18 August at 0600 ZT, morning stars were observed, and the vessel's position was determined to be LAT 19°48'N, LONG 108°34'W. Your vessel is steaming on course 166°T at a speed of 16 knots. An observation of the Sun's lower limb is made at 1036 ZT. The chronometer reads 05h 34m 48s and is slow 01m 24s. What is the computed altitude (Hc) and azimuth (Zn) for this 1036 ZT observation using the assumed position method?Not learned 171. On 18 May your 1030 ZT DR position is LAT 18°30'N, LONG 62°31'W. You are on course 286°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun.Not learned 172. On 18 May your 1030 ZT DR position is LAT 20°41'N, LONG 63°32'W. You are on course 106°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun. Zone Time GHA Declination Ho 1204 61°54.6' N 19°37.6' 88°39.7' 1210 63°24.6' N 19°37.7' 88°59.2'Not learned 173. On 18 November your 1750 zone time DR position is LONG 110°16.0' W. At that time you observe Polaris with a sextant altitude (hs) of 21°29.8'. The chronometer time of the sight is 00h 52m 43s, and the chronometer error is 02m 18s fast. The index error is 3.2' on the arc, and the height of eye is 49.5 feet. What is your latitude by Polaris?Not learned 174. On 18 October at 0518 ZT, morning stars were observed and the vessel's position was determined to be LAT 25° 31.0' N, LONG 146° 29.2' E. Your vessel is steaming at 19.0 knots on a course of 308° T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 11h 17m 11s, and the sextant altitude (hs) is 34° 51.4'. The index error is 2.0' off the arc, and the chronometer error is 01m 57s fast. Your height of eye on the bridge is 54.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 175. On 18 October your 1330 ZT DR position is LAT 27°32.0'N, LONG 154°47.0'W. You are on course 115°T at a speed of 20 knots. What will be the zone time of sunset at your vessel?Not learned 176. At 1800 zone time, on 7 December, your DR position is LAT 22°48'S, LONG 91°26'W. You are steering 320°T at a speed of 14.0 knots. What is the zone time of sunset?Not learned 177. At 1830 zone time, on 6 April your DR position is LAT 26°33.0' N, LONG 64°31.0' W. You are steering course 082°T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix. Body Zone Time GHA Observed Declination Altitude Sirius 1836 73°02.7' 46°00.5' S 16°41.7' Regulus 1842 23°46.9' 49°07.2' N 12°03.5' Mirfak 1900 129°24.3' 35°50.5' N 49°47.7'Not learned 178. At 1845 zone time, on 17 March, while taking stars for an evening fix, you observe an unidentified star bearing 200° T at an observed altitude of 53° 45.0'. Your DR position at the time of the sight is LAT 25° 10.0' N, LONG 66° 48.0' W. The chronometer time of the sight is 10h 47m 49s, and the chronometer error is 1m 54s fast. Your vessel is steaming on a course of 290° T at a speed of 18.0 knots. What star did you observe?Not learned 179. On 19 July your 1500 ZT DR position is LAT 28°25.0'N, LONG 120°28.0'W. You are on course 233°T at a speed of 10 knots. What will be the zone time of sunset at your vessel?Not learned 180. On 19 June your vessel's 0523 ZT DR position is LAT 25° 12.0' N, LONG 123° 14.0' W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 052.0° per standard compass. Variation in the area is 15° E. The chronometer reads 01h 21m 58s and is 01m 18s slow. What is the deviation of the standard compass?Not learned 181. On 19 November your 0146 ZT position is LAT 33°48'N, LONG 25°22'E. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman noted that he was heading 224°pgc and 222.5°psc. The variation is 2°E. What is the deviation for that heading?Not learned 182. On 19 November your 0200 zone time DR position is LAT 18°41'N, LONG 150°37'E. You are on course 014°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.Not learned 183. On 19 November your 0200 zone time DR position is LAT 20°29.0' N, LONG 150°21.3' E. You are on course 136°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. Body Zone Time GHA Observed Declination Altitude Regulus 0530 198°24.3' 77°21.3' N 12°03.4' Arcturus 0532 137°03.2' 22°47.9' ' N 19°16.7 Suhail 0537 215°10.4' 26°44.9' S 43°21.2'Not learned 184. On 19 November your 0300 zone time DR position is LAT 19° 23' N, LONG 151° 37' E. You are on course 293° T at a speed of 17 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. Body Zone Time GHA Observed Altitude Declination Mars 0525 180°59.9' 60°05.5' N 07°05.2' Arcturus 0532 137°03.2' 22°39.0' N 19°16.7' Suhail 0537 215°10.4' 26°51.3' S 43°21.2'Not learned 185. On 19 November in DR position LAT 20° 03.5' N, LONG 129° 48.0' W, you take an ex-meridian observation of the planet Venus at upper transit. The chronometer time of the sight is 11h 29m 44s, and the chronometer error is 01m 23s slow. The sextant altitude (hs) is 43° 54.3'. The index error is 2.0' off the arc, and your height of eye is 48 feet. What is the latitude at meridian transit?Not learned 186. On 19 September your 0300 zone time DR position is LAT 24° 35' N, LONG 88° 40' W. You are on course 288° T at a speed of 14 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. ZONE OBSERVED BODY TIME GHA ALTITUDE (Ho) DECLINATION ------------------- -------- ------------- ------------ --------------- Regulus 0530 018° 56.5' 22° 45.2' N 12° 03.6' Sirius 0532 070° 12.2' 44° 30.6' S 16° 41.3' Hamal 0536 140° 44.1' 43° 16.5' N 23° 22.5'Not learned 187. On 2 April your 0830 zone time fix gives you a position of LAT 20°16.0'S, LONG 004°12.0'E. Your vessel is steaming a course of 143°T at a speed of 18.0 knots. An observation of the Sun's upper limb is made at 0903 zone time, and the observed altitude (Ho) is 42°39.6'. The chronometer reads 09h 05m 40s, and the chronometer error is 02m 15s fast. Local apparent noon occurs at 1145 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 63°46.2'. Determine the vessel's 1200 zone time position.Not learned 188. On 2 April your 0900 zone time DR position is LAT 28°04.0'S, LONG 94°14.0'E. Your vessel is on course 316°T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)?Not learned 189. On 2 February your 0400 zone time DR position is LAT 24° 14.0' N, LONG 163° 28.0' W. You are on course 322° T at a speed of 22 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 190. On 2 January your 1759 zone time DR longitude is 45°17.6' W. At that time you observe Polaris with a sextant altitude (hs) of 24°16.5'. The chronometer time of the sight is 08h 57m 10s, and the chronometer error is 02m 16s slow. The index error is 3.5' on the arc, and the height of eye is 42.5 feet. What is your latitude by Polaris?Not learned 191. On 2 January you are on a course of 094° T at a speed of 20 knots. At 0430 ZT, your DR position is LAT 24° 12' N, LONG 71° 24' W. Determine the zone time of sunrise.Not learned 192. On 2 January you observe the lower limb of the Sun at a sextant altitude (hs) of 35° 50.4'. The index error is 0.8' on the arc. The height of eye is 24 feet (7.3 meters). What is the observed altitude (Ho)?Not learned 193. On 2 January your vessel's 1948 zone time position is LAT 21° 42' S, LONG 39° 12' W, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 260° per standard magnetic compass. Variation in the area is 19° W. The chronometer reads 10h 44m 36s and is 03m 24s slow. What is the deviation of the standard magnetic compass?Not learned 194. On 2 March your 2216 ZT DR position is LAT 21° 20.0' S, LONG 17° 10.0' W. At that time, you observe Saturn bearing 078° psc. The chronometer reads 11h 14m 04s, and the chronometer error is 02m 20s slow. The variation is 4.5° W. What is the deviation of the standard compass?Not learned 195. On 2 October your 1845 DR position is LAT 28°09.2'S, LONG 167°48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 11°37.6' bearing 066°T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?Not learned 196. On 2 October your 1845 DR position was LAT 28°09.2'S, LONG 167°48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 20°45.6' T, bearing 201.5°T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 00m 51s fast. What star did you observe?Not learned 197. On 2 October your 1845 DR position is LAT 28° 09.2' S, LONG 167° 48.1' E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 25° 19.4' bearing 273° T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?Not learned 198. On 2 October your 1845 DR position is LAT 28°09.2'S, LONG 167°48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 63°29.1' bearing 237.5°T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?Not learned 199. On 2 October your 1845 DR position is LAT 28° 09.2' S, LONG 167° 48.1' E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 68° 03.6' bearing 154° T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?Not learned 200. On 20 February your 0530 ZT DR position is LAT 24° 15.0' N, LONG 137° 33.0' W. You are on course 033° T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. Body Zone Time GHA Observed Declination Regulus 0540 218°35.9' 13°02.2' N 12°03.5' Antares 0552 126°23.5' 38°04.1' S 26°23.3' Vega 0600 96°23.2' 52°33.5' N 38°45.8'Not learned 201. On 20 July your vessel's 1626 zone time DR position is LAT 27°13.0'N, LONG 63°42.0'W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information. Chronometer time: 08h 24m 18s Chronometer error: slow 02m 12s Gyro bearing: 279.3° Variation: 15°WNot learned 202. On 20 June your 0800 zone time DR position is LAT 21°02.0'N, LONG 152°50.0'E. Your vessel is on course 265°T at a speed of 15.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 203. On 20 June your 1742 zone time DR position is LAT 24°55.0' S, LONG 8°19.6' E. Considering their magnitude, azimuth, and altitude, which three stars are best suited for a fix at star time?Not learned 204. On 20 June your vessel's 1955 ZT DR position is LAT 52° 38.9' N, LONG 03° 42.7' E, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 311° per gyrocompass. Variation in the area is 6° W. At the time of the observation, the helmsman noted that he was heading 352° per gyrocompass and 358° per steering compass. What is the gyro error and deviation for that heading?Not learned 205. On 20 November your 0612 zone time (ZT) position was LAT 25°38.0'N, LONG 166°54.0'W. Your vessel was steaming on course 126°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0854 ZT. The chronometer read 07h 51m 14s and was slow 02m 52s. The observed altitude (Ho) was 27°58.3'. LAN occurred at 1147 ZT. The observed altitude (Ho) was 45°35.0'. What was the longitude of your 1147 ZT running fix?Not learned 206. On 20 November your 1030 ZT DR position is LAT 27°16.0'N, LONG 157°18.6'E. You are on course 060°T at a speed of 20 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1200 running fix.Not learned 207. On 20 September your 0730 zone time position was LAT 28°58.0'N, LONG 152°26.0'W. Your vessel was steaming on course 225°T at a speed of 19.0 knots. An observation of the Sun's lower limb was made at 0931 ZT. The chronometer read 07h 29m 20s and was slow 02m 22s. The observed altitude (Ho) was 44°14.4'. LAN occurred at 1206 zone time. The observed altitude (Ho) was 62°49.5'. What was the longitude of your 1200 zone time running fix?Not learned 208. At 2043 ZT on 13 October you are in DR position LAT 43°57.3' S, LONG 147°16.0' E, when you observe an amplitude of Venus. The planet is about one Sun's diameter above the horizon and bears 236.2°pgc. The variation is 15°E. What is the gyro error?Not learned 209. At 2048 ZT on 13 October you are in DR position LAT 44° 02.8' S, LONG 146° 58.3' E, when you observe an amplitude of Venus. The planet is about one Sun's diameter above the visible horizon and bears 222.2° psc. The variation is 15° E. What is the deviation?Not learned 210. On 21 April your 1542 zone time DR position is LAT 28°54.0'S, LONG 19°07.0'W. At that time, you observe the Sun bearing 299°psc. The chronometer reads 04h 44m 11s, and the chronometer error is 01m 54s fast. The variation is 3°E. What is the deviation of the standard compass?Not learned 211. On 21 February your 0823 zone time DR position is LAT 21° 44.0' S, LONG 80° 14.0' E. At that time, you observe the Sun bearing 096° psc. The chronometer reads 03h 25m 19s, and the chronometer error is 01m 52s fast. The variation is 5° W. What is the deviation of the standard magnetic compass?Not learned 212. On 21 November at 0430 ZT, morning stars were observed, and the vessel's position was LAT 22° 14.0' S, LONG 79° 23.0' E. Your vessel is steaming at 14.5 knots on a course of 246° T. A sextant observation of the Sun's lower limb is made at 0816 ZT. The chronometer reads 03h 14m 16s, and the sextant altitude (hs) is 44° 29.2'. The index error is 1.0' on the arc, and the chronometer error is 01m 47s slow. Your height of eye is 61.0 feet (18.6 meters). What is the azimuth (Zn) and intercept (a) of this sight using the assumed position method?Not learned 213. On 22 April your 0344 zone time DR position is LAT 21° 16.0' N, LONG 107° 32.0' W. At that time, you observe Spica bearing 236° psc. The chronometer reads 10h 45m 16s, and the chronometer error is 00m 25s fast. The variation is 7.5° E. What is the deviation of the standard compass?Not learned 214. On 22 April your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 248°T at an observed altitude (Ho) of 25°00.9'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?Not learned 215. On 22 April your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 259°T at an observed altitude (Ho) of 41°15.2'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?Not learned 216. On 22 August your 1852 zone time DR position is LONG 155° 54.0' E. At that time you observe Polaris with a sextant altitude (hs) of 27° 36.9'. The chronometer time of the sight is 08h 54m 06s, and the chronometer error is 02m 20s fast. The index error is 3.6' off the arc, and the height of eye is 61.5 feet. What is your latitude by Polaris?Not learned 217. On 22 August in DR position LAT 29° 41.8' N, LONG 33° 15.5' W, you take an ex-meridian observation of the Moon's upper limb at upper transit. The chronometer time of the sight is 08h 00m 02s, and the chronometer error is 02m 20s slow. The sextant altitude (hs) is 74° 32.4'. The index error is 1.5' off the arc, and your height of eye is 48 feet. What is the latitude at meridian transit?Not learned 218. On 22 February your 0612 zone time fix gives you a position of LAT 27°16.2'S, LONG 37°41.6'W. Your vessel is on course 298°T, and your speed is 14.2 knots. Local apparent noon (LAN) occurs at 1147 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 73°33.3'. What is the calculated latitude at LAN?Not learned 219. On 22 February your 0800 zone time position is LAT 24°16'S, LONG 95°37'E. Your vessel is on course 126°T at a speed of 14 knots. An observation of the Sun's lower limb is made at 0945 zone time. The chronometer reads 03h 47m 22s, and the chronometer error is 02m 37s fast. The observed altitude (Ho) is 57°02.1'. LAN occurs at 1148 zone time, and a meridian altitude of the Sun's lower limb is made. The observed meridian altitude (Ho) is 75°22.3'. Determine the vessel's 1200 zone time position.Not learned 220. On 22 February your 1857 ZT DR position is LAT 23° 46.0' S, LONG 93° 16.5' E. You observe an unidentified star bearing 159° T, at an observed altitude (Ho) of 34° 30.0'. The chronometer reads 01h 00m 35s and is 03m 25s fast. What star did you observe?Not learned 221. On 22 February your 2045 ZT position is LAT 33°19'N, LONG 52°06'W. You observe Polaris bearing 358.1°pgc. At the time of the observation the helmsman noted that he was heading 048°pgc and 065°psc. The variation is 19°W. What is the deviation for that heading?Not learned 222. On 22 July your 0442 DR position is LAT 26°35.6'N, LONG 22°16.7'W. You observe an unidentified star bearing 104°T at an observed altitude (Ho) of 9°55.7'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?Not learned 223. On 22 July at 0448 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21° 43.0' N, LONG 158° 39.0' E. Your vessel is steaming at 21.0 knots on a course of 028° T. A sextant observation of the Sun's lower limb is made at 0956 ZT. The chronometer reads 10h 54m 27s, and the sextant altitude is 54° 28.2'. The index error is 1.5' off the arc, and the chronometer error is 01m 38s slow. Your height of eye on the bridge is 56 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 224. On 22 July at 0720 ZT, in DR position LAT 20°38.2'N, LONG 87°16.0'W, you observe the Moon's lower limb. The sextant altitude (hs) is 38°32.6, and the chronometer reads 01h 18m 14s. The chronometer is 01m 28s slow. The index error is 3.1' off the arc, and the height of eye is 68 feet. What is the azimuth (Zn) and intercept (a) of this sight from the assumed position?Not learned 225. On 22 July your 1759 DR position is LAT 24° 50.2' S, LONG 05° 16.0' E. You observe an unidentified star bearing 293° T at an observed altitude (Ho) of 17° 52.8'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?Not learned 226. On 22 July your 1759 ZT DR position is LAT 24° 50.2' S, LONG 05° 16.0' E. You observe an unidentified star bearing 231° T, at an observed altitude (Ho) of 26° 10.0'. The chronometer reads 06h 01m 31s and is 02m 15s fast. What star did you observe?Not learned 227. On 22 June your 0400 zone time DR position is LAT 23° 00' N, LONG 81° 45' W. You are steaming on course 110° T at a speed of 8.6 knots. What will be the zone time of sunrise at your vessel?Not learned 228. On 22 June your 0424 ZT DR position is LAT 26°18.5' N, LONG 124°18.2' W. You observe an unidentified star bearing 031°T at an observed altitude (Ho) of 49°26.0'. The chronometer reads 00h 23m 24s and is 01m 32s slow. What star did you observe?Not learned 229. On 22 June your 0424 DR position is LAT 26°18.5' N, LONG 124°18.2' W. You observe an unidentified star bearing 249°T at an observed altitude (Ho) of 52°50.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe?Not learned 230. On 22 June at 0906 EDT (ZD +4), your position is LAT 24° 36' N, LONG 69° 30' W. You are on course 165° pgc at a speed of 14.8 knots. A sextant observation of the Sun's lower limb is made, and the sextant altitude (hs) is 42° 44.0' with an index error of 0.8' off the arc. At this time the chronometer reads 01h 10m 12s, and is 2m 42s slow. If your height of eye is 70 feet, what is the azimuth (Zn) of the sight using the assumed position?Not learned 231. On 22 March your 0519 DR position is LAT 27° 20.6' N, LONG 69° 25.6' W. You observe an unidentified star bearing 051° T at an observed altitude (Ho) of 50° 03.7'. The chronometer reads 10h 16m 47s, and is 02m 15s slow. What star did you observe?Not learned 232. On 22 March your 0519 DR position is LAT 27° 20.6' N, LONG 69° 25.6' W. You observe an unidentified star bearing 115° T at an observed altitude (Ho) of 54° 52.8'. The chronometer reads 10h 16m 47s, and is 02m 15s slow. What star did you observe?Not learned 233. On 22 March your 0519 DR position is LAT 27° 20.6' N, LONG 69° 25.6' W. You observe an unidentified star bearing 200° T at an observed altitude (Ho) of 33° 05.5'. The chronometer reads 10h 16m 47s, and is 02m 15s slow. What star did you observe?Not learned 234. On 22 March your 0519 ZT DR position is LAT 27° 20.6' N, LONG 69° 25.6' W. You observe an unidentified star bearing 094° T, at an observed altitude (Ho) of 30° 15.0'. The chronometer reads 10h 16m 47s and is 02m 15s slow. What star did you observe?Not learned 235. On 22 March your 1834 ZT DR position is LAT 26°13.5' S, LONG 108°36.5' W. You observe an unidentified star bearing 077°T, at an observed altitude (Ho) of 43°10.5'. The chronometer reads 01h 32m 37s and is 01m 50s slow. What star did you observe?Not learned 236. On 22 May your 0437 ZT DR position is LAT 25°18.5' N, LONG 51°18.0' W. You observe an unidentified star bearing 097°T at an observed altitude (Ho) of 48°20.0'. The chronometer reads 07h 40m 40s and is 03m 24s fast. What star did you observe?Not learned 237. On 22 May your 0437 DR position is LAT 25° 18.5' N, LONG 51° 18.0' W. You observe an unidentified star bearing 142° T at an observed altitude (Ho) of 23° 10.2'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?Not learned 238. On 22 May at 0440 ZT, your vessel's DR position is LAT 23° 24' N, LONG 110° 24' W. At approximately this time, you obtain a sextant altitude (hs) of Polaris reading 23° 40.9' with an index error of 1.6' on the arc. Your chronometer reads 11h 42m 14s, and is 2m 36s fast. What is your latitude by Polaris, given a height of eye of 24 feet?Not learned 239. On 22 November your 1400 ZT DR position is LAT 22°16.0'N, LONG 136°37.0'E. You are on course 038°T at a speed of 22 knots. What will be the zone time of sunset at your vessel?Not learned 240. On 22 November your vessel is enroute from Accra, Ghana to Montevideo, Uruguay. You are on course 240°T and making a speed of 15.0 knots. Your 1129 DR position is LAT 28°25.0'S, LONG 42°40.0'W. You observed 3 celestial bodies. Determine the latitude and longitude of your 1137 running fix.Not learned 241. On 22 October in DR position LAT 21° 51.0' S, LONG 76° 24.0' E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 256° psc. The chronometer reads 01h 01m 25s and is 01m 15s fast. Variation for the area is 2° E. What is the deviation of the standard magnetic compass?Not learned 242. At 2231 ZT on 14 July you are in DR position LAT 34° 06' S, LONG 149° 47' W, when you observe an amplitude of Jupiter. The planet is about one Sun's diameter above the visible horizon and bears 257.1° psc. The variation is 15° E. What is the deviation?Not learned 243. At 2232 ZT on 14 July you are in DR position LAT 33° 52' S, LONG 150° 03' W, when you observe an amplitude of Jupiter. The planet is about one Sun's diameter above the visible horizon and bears 268.5° pgc. The variation is 15° E. What is the gyro error?Not learned 244. At 2234 ZT on 14 July you are in DR position LAT 34° 03' N, LONG 150° 16' W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 272.1° pgc. The variation is 14° E. What is the gyro error?Not learned 245. At 2237 ZT on 14 July you are in DR position LAT 33°57'N, LONG 150°32'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 258.6°psc. The variation is 14°E. What is the deviation?Not learned 246. On 23 August at 0604 ZT, in DR position LAT 16° 42.3' S, LONG 28° 19.3' W, you observed an amplitude of the Sun. The lower limb was a little above the horizon, and the Sun bore 076.0° pgc. At the time of the observation, the helmsman reported that he was heading 143° pgc and 167° per standard magnetic compass. The variation in the area was 23° W. What were the gyro error and deviation for that heading?Not learned 247. On 23 August in DR position LAT 24°07.0'N, LONG 136°16.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 074.5°psc. The chronometer reads 08h 56m 19s and is 02m 34s fast. Variation in the area is 2°W. What is the deviation of the magnetic compass?Not learned 248. On 23 August in DR position LAT 24° 22.0' S, LONG 64° 55.3' E, you take an ex-meridian observation of the Moon's upper limb at upper transit. The chronometer time of the sight is 02h 15m 04s, and the chronometer error is 01m 06s fast. The sextant altitude (hs) is 48° 03.6'. The index error is 2.0' on the arc, and your height of eye is 60 feet (21.0 meters). What is the latitude at meridian transit?Not learned 249. On 23 July your 1700 zone time DR position is LAT 27° 29' N, LONG 129° 26' W. You are on course 079° T at a speed of 20 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 250. On 23 July your 2100 ZT position is LAT 36°43.0'N, LONG 16°09.8'W, when you observed an azimuth of Polaris to determine the compass error. Polaris bears 359.0° per gyrocompass. At the time of the observation, the helmsman noted that he was heading 319.0° per gyrocompass and 331.0° per standard compass. Variation is 12.0°W. Which of the following statements is TRUE?Not learned 251. On 26 September your 0830 zone time DR position is LAT 23°04.0'N, LONG 129°16.0'E. Your vessel is on course 119°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 252. On 23 June in DR position LAT 21°39.0'S, LONG 106°28.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 078°psc. The chronometer reads 02h 14m 39s and is 01m 43s slow. Variation in the area is 9°W. What is the deviation of the standard magnetic compass?Not learned 253. On 23 March your 1600 ZT DR position is LAT 27° 16.3' N, LONG 156° 48.2' W. You are on course 063° T at a speed of 18.0 knots. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?Not learned 254. On 23 May your 0628 zone time position was LAT 28°18.0'S, LONG 102°42.0'E. Your vessel was steaming on course 040°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0758 ZT. The chronometer read 01h 02m 06s and was fast 04m 04s. The observed altitude (Ho) was 13°16.7'. LAN occurred at 1201 zone time. The observed altitude (Ho) was 42°32.0'. What was the longitude of your 1201 zone time running fix?Not learned 255. On 23 October in DR position LAT 21° 13.0' N, LONG 152° 18.0' E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 259° psc. The chronometer reads 07h 21m 46s and is 01m 32s slow. Variation in the area is 5° E. What is the deviation of the magnetic compass?Not learned 256. On 23 October your vessel's 1722 zone time DR position is LAT 27°36'S, LONG 96°16'W, when an amplitude of the Sun is observed. The Sun's lower limb is about 20 minutes of arc above the visible horizon and bears 246° per standard compass. Variation in the area is 14.0°E. The chronometer reads 11h 24m 19s and is 01m 43s fast. What is the deviation of the standard compass?Not learned 257. On 23 September your 1836 DR position is LAT 25° 18' S, LONG 162° 23' E. You observe an unidentified star bearing 000° T at an observed altitude (Ho) of 26° 18'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. What star did you observe?Not learned 258. On 23 September your 1836 DR position is LAT 25° 18' S, LONG 162° 36' E. You observe an unidentified star bearing 022° T at an observed altitude (Ho) of 13° 16'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. What star did you observe?Not learned 259. On 23 September your 1836 DR position is LAT 25° 18' S, LONG 162° 36' E. You observe an unidentified star bearing 148° T at an observed altitude (Ho) of 13° 32'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. Which star did you observe?Not learned 260. On 23 September while taking stars for an evening fix, an unidentified star is observed bearing 261° T at an observed altitude of 61° 35'. Your 1836 zone time DR position is LAT 25° 18' S, LONG 162° 36' E. The chronometer reads 07h 34m 12s, and the chronometer error is 01m 54s slow. Your vessel is steaming on a course of 230° T at a speed of 18 knots. What star did you observe?Not learned 261. At 2326 ZT on 22 June, your vessel's position is LAT 28° 30' N, LONG 150° 04' W. An azimuth of the planet Jupiter is observed, and the standard compass bearing is 250.4°. The chronometer reads 09h 24m 36s and is 01m 12s slow. The variation of this area is 13.5° E. What is the deviation of the standard compass?Not learned 262. On 24 August in DR position LAT 26° 49.4' N, LONG 146° 19.4' E, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 084° psc. The chronometer reads 07h 55m 06s and is 01m 11s fast. Variation in the area is 15° W. What is the deviation of the magnetic compass?Not learned 263. On 24 August your vessel is enroute from Perth, Australia, to Bombay, India. Evening twilight will occur at 1807 zone time and your vessel's DR position will be LAT 27°17.0' S, LONG 83°17.0' E. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time?Not learned 264. On 24 January your 0700 zone time DR position is LAT 22°25.0'N, LONG 46°10.0'W. Your vessel is on course 110°T at a speed of 12.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 265. On 24 July your 1912 zone time DR position is LAT 24°28.0' N, LONG 73°46.5' W. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?Not learned 266. On 24 March your 0800 zone time fix gives you a position of LAT 22°16.0'N, LONG 31°45.0'W. Your vessel is steaming a course of 285°T at a speed of 16.5 knots. An observation of the Sun's upper limb is made at 0938 zone time, and the observed altitude (Ho) is 46°32.2'. The chronometer reads 11h 41m 01s, and the chronometer error is 02m 50s fast. Local apparent noon occurs at 1214 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 68°55.8'. Determine the vessel's 1200 zone time position.Not learned 267. On 24 March your vessel is enroute from Cadiz to Norfolk. Evening twilight will occur at 1830 zone time and your vessel's DR position will be LAT 35° 06' N, LONG 60° 48' W. Considering their azimuth, altitude, and magnitude, which group of stars is best suited for plotting a star fix at star time?Not learned 268. On 24 May your vessel's 1000 ZT position is LAT 25°36.0'N, LONG 118°39.5'W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information. Chronometer time: 06h 21m 48s Chronometer error: fast 01m 36s Gyro bearing: 099.4° Variation: 11.1°ENot learned 269. On 24 October your 0100 DR position is LAT 27°42' N, LONG 158°35' E. You are on course 085°T at a speed of 12 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0700 running fix. Body Zone Time GHA Observed Declination Altitude Rigel 0558 238°11.2' 38°39.5' S 08°13.2' Capella 0600 238°16.1' 55°15.1' N 45°58.7' Denebola 0604 141°05.0' 33°39.8' N 14°40.6'Not learned 270. On 24 September your 1841 zone time DR position is LONG 129°34.5' E. At that time you observe Polaris with a sextant altitude (hs) of 25°20.8'. The chronometer time of the sight is 09h 38m 12s, and the chronometer error is 03m 12s slow. The index error is 4.3' off the arc, and the height of eye is 52 feet (15.9 meters). What is your latitude by Polaris?Not learned 271. On 25 April your 0930 zone time position is LAT 28° 35' S, LONG 82° 30' W. Your vessel is on course 300° T at a speed of 20.0 knots. Determine the zone time of LAN.Not learned 272. On 25 April your 1130 DR position is LAT 24° 50.0' N, LONG 61° 25.0' W. Your vessel is on a course of 300° T at a speed of 16.0 knots. Determine the zone time of (LAN) for your vessel.Not learned 273. On 25 August your 0300 zone time DR position is LAT 21° 28.0' N, LONG 167° 48.0' E. You are on course 248° T at a speed of 12 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. ZONE OBSERVED BODY TIME GHA ALTITUDE (Ho) DECLINATION ------------------- -------- ------------- ------------ --------------- Rigel 0512 167° 31.4' 51° 37.7' S 8° 13.2' Diphda 0518 236° 46.1' 31° 52.1' S 18° 05.2' Acamar 0524 204° 33.0' 27° 40.9' S 40° 22.5'Not learned 274. On 25 August your 1926 zone time DR position is LAT 24° 17.0' S, LONG 05° 47.0' W. At that time, you observe Fomalhaut bearing 117° psc. The chronometer reads 07h 26m 52s, and the chronometer error is 00m 15s fast. The variation is 1.5° E. What is the deviation of the standard magnetic compass?Not learned 275. On 25 December your 0330 ZT DR position is LAT 25°15.0'N, LONG 32°16.0'W. You are on course 145°T at a speed of 20 knots. What will be the zone time of sunrise at your vessel?Not learned 276. On 25 February at 0622 ZT, you observe the upper limb of the Moon with a sextant altitude of 59° 58.6'. Your DR position is LAT 30° 28.3' S, LONG 102° 39.3 E. The chronometer reading at the time of the sight is 11h 21m 18s and the chronometer is 48s slow. The height of eye is 59 feet and the index error is 2.5' on the arc. What are the azimuth (Zn) and intercept (a) of this sight using the assumed position?Not learned 277. On 25 June at 0612 zone time, morning stars were observed, and the vessel's position was determined to be LAT 28° 13.0' S, LONG 49° 34.0' E. Your vessel is steaming at 17.0 knots on a course of 066° T. A sextant observation of the Sun's lower limb is made at 1022 zone time. The chronometer reads 07h 19m 17s, and the sextant altitude is 35° 26.3'. The index error is 1.5' on the arc, and the chronometer error is 02m 51s slow. Your height of eye on the bridge is 58.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 278. On 25 June your 0900 zone time DR position is LAT 24° 10.0' S, LONG 148° 30.0' W. Your vessel is on a course of 230° T at a speed of 18.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 279. On 25 March your 0500 ZT DR position is LAT 28° 14.0' S, LONG 93° 17.0' E. You are on course 291° T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0550 running fix. ZONE OBSERVED BODY TIME GHA ALTITUDE (Ho) DECLINATION ------------------- -------- ------------- ------------ --------------- Peacock 0520 226° 18.5' 49° 42.9' S 56° 47.6' Altair 0535 238° 38.2' 43° 53.1' N 8° 48.9' Spica 0550 338° 48.5' 21° 11.7' S 11° 03.8'Not learned 280. On 25 May your vessel's 1858 zone time position is LAT 21°05.0'N, LONG 143°27.0'E. At that time a sextant observation of the planet Venus was made. The sextant altitude is 12°53.4' and the chronometer reads 08h 59m 15s. The index error is 4.5' off the arc, and the chronometer error is 01m 25s fast. Your height of eye is determined to be 55.0 feet. What is the azimuth (Zn) of the sight using the assumed position?Not learned 281. On 25 May your vessel's 1917 zone time position is LAT 24° 16.0' N, LONG 017° 26.0' W. At that time a sextant observation of the planet Saturn was made. The sextant altitude is 63° 05.1', and the chronometer reads 08h 18m 24s. The index error is 4.5' off the arc, and the chronometer error is 01m 05s fast. Your height of eye is determined to be 62.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 282. On 25 October your 0430 ZT DR position is LAT 24°48' N, LONG 65°31' W. Your vessel is on course 030°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0455 running fix. Body Zone Time GHA Observed Declination Altitude Mirfak 0430 110°23.1' 47°20.8' N 49°47.7' Regulus 0440 011°48.3' 37°49.9' N 12°03.5' Sirius 0455 066°19.5' 48°25.3' S 16°41.3'Not learned 283. On 26 February your vessel's 1615 ZT DR position is LAT 25° 14' S, LONG 57° 22' W, when an azimuth of the Sun is observed. The chronometer time of the sight is 8h 13m 19s, and the Sun is bearing 266.0° per standard magnetic compass. The chronometer error is 01m 46s slow, and the variation in the area is 6° E. What is the deviation of the standard compass?Not learned 284. On 26 January your 1615 ZT DR position is LAT 27° 14.0' S, LONG 57° 22.0' W. At that time, you observe the Sun bearing 266° psc. The chronometer reads 08h 13m 19s, and the chronometer error is 01m 46s slow. The variation is 4° E. What is the deviation of the standard magnetic compass?Not learned 285. On 26 July your 1030 ZT DR position is LAT 18°25'N, LONG 51°15'W. You are on course 231°T, speed 15 knots. Determine your 1200 position using the following observations of the Sun.Not learned 286. On 26 July your 1901 ZT position is LAT 28° 28' N, LONG 157° 16' E when you take an observation of Jupiter. The chronometer at the time of the sight reads 08h 54m 34s and is 06m 24s slow. The sextant altitude (hs) is 33° 51.5'. The index error is 2.8' off the arc, and the height of eye is 48 feet. What are the azimuth (Zn) and intercept (a) for this sight using the assumed position?Not learned 287. On 26 May your 0723 zone time DR position is LAT 24°50.0'N, LONG 38°11.0'W. At that time, you observe the Sun bearing 076.5°psc. The chronometer reads 10h 25m 43s, and the chronometer error is 02m 57s fast. The variation is 7°W. What is the deviation of the standard magnetic compass?Not learned 288. On 26 May your vessel's 1906 zone time position is LAT 27° 16.0' N, LONG 24° 37.0' W. At that time, a sextant observation of the planet Jupiter was made. The sextant altitude is 63° 27.6', and the chronometer reads 09h 05m 16s. The index error is 5.2' on the arc, and the chronometer error is 01m 25s slow. Your height of eye is determined to be 52.6 feet. What is the (Zn) of this sight using the assumed position?Not learned 289. On 26 November your 0535 DR position is LAT 27°18.9' S, LONG 30°18.4' E. You observe an unidentified planet bearing 085°T at an observed altitude (Ho) of 32°15.2'. The chronometer reads 03h 33m 16s, and is 01m 48s slow. What planet did you observe?Not learned 290. On 26 November at 0535 ZT, while taking sights for a morning fix, you observe an unidentified planet bearing 074° T at an observed altitude (Ho) of 38° 29.8'. Your DR position is LAT 27° 18.9' S, LONG 30° 18.4' E. The chronometer time of the sight is 03h 33m 16s, and the chronometer is 01m 48s slow. What planet did you observe?Not learned 291. On 26 September your 0830 zone time DR position is LAT 26°04.0'N, LONG 129°16.0'W. Your vessel is on course 119°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 292. On 27 August your 0900 zone time DR position is LAT 24°25.0'N, LONG 94°20.0'W. Your vessel is on course 071°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 293. On 27 June your 0734 zone time DR position is LAT 22°14.0'N, LONG 53°52.0'W. At that time, you observe the Sun bearing 069.5°psc. The chronometer reads 11h 32m 51s and the chronometer error is 01m 26s slow. The variation is 5°E. What is the deviation of the standard magnetic compass?Not learned 294. On 27 June your 1905 ZT DR position is LAT 24° 35.0' N, LONG 50° 15.0' W. At that time, you observe Saturn bearing 211° pgc. The chronometer reads 10h 04m 26s and the chronometer error is 01m 20s slow. The variation is 4.5° E. What is the gyro error?Not learned 295. On 27 June your vessel's 0816 ZT DR position is LAT 22°14'S, LONG 53°52'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 12h 15m 02s, and the Sun is bearing 047.5° per standard magnetic compass. The chronometer error is 00m 46s slow, and the variation in the area is 6.0°E. What is the deviation of the standard magnetic compass?Not learned 296. On 27 March your 0330 zone time DR position is LAT 23° 32' N, LONG 154° 47' E. Your vessel is on a course of 105° T at a speed of 20 knots. What will be the zone time of sunrise at your vessel?Not learned 297. On 27 March your 0730 zone time position is LAT 28°16'N, LONG 56°37'W. Your vessel is on course 158°T at a speed of 15.0 knots. An observation of the Sun's lower limb is made at 0915 zone time. The chronometer reads 01h 14m 11s, and the chronometer error is 00m 53s slow. The observed altitude (Ho) is 45°10.7'. LAN occurs at 1150 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) is 65°32.8'. Determine the vessel's 1200 zone time position.Not learned 298. On 27 March in DR position LAT 32° 31.0' N, LONG 76° 25.0' W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 05h 23m 32s, and the chronometer error is 01m 30s fast. The sextant altitude (hs) is 59° 59.0'. The index error is 1.8' off the arc, and your height of eye is 52 feet. What is the latitude at meridian transit?Not learned 299. On 27 September your 0345 ZT DR position is LAT 26° 18.0' S, LONG 4° 18.0' W. You are on course 271° T at a speed of 15 knots. What will be the zone time of sunrise at your vessel?Not learned 300. On 28 April your vessel's 0515 zone time position is LAT 23° 26' S, LONG 95° 30' E. At this time, the observed altitude (Ho) of the star Rigil Kentaurus is 24° 51.4'. Your chronometer reads 11h 16m 36s and is 01m 18s fast. What is theintercept (a) based on the assumed position method?Not learned 301. On 28 February your 1850 zone time DR position is LAT 27°49.0'N, LONG 159°24.0'W. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?Not learned 302. On 28 July your 0800 zone time fix gives you a position of LAT 25° 16.0' N, LONG 71° 19.0' W. Your vessel is on course 026° T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1149 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82° 28.7'. What is the calculated latitude at LAN?Not learned 303. On 28 July your 0800 zone time (ZT) fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course 026°T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1150 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82°28.7'. What is the latitude at 1200 ZT?Not learned 304. On 28 July your 1937 zone time DR position is LAT 26°13.0' N, LONG 78°27.0' E. At that time, you observe Deneb bearing 048.7°pgc. The chronometer reads 02h 37m 42s, and the chronometer error is 00m 15s fast. The variation is 4°W. What is the gyro error?Not learned 305. On 28 June your 1820 ZT DR position is LAT 16°00.0'N, LONG 31°00.0'W. You are on course 310°T at a speed of 18 knots. What will be the zone time of sunset at your vessel?Not learned 306. On 28 May your 0200 DR position is LAT 19°16.5' S , LONG 119°24.0' W. You are on course 107°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. Body Zone Time GHA Observed Declination Altitude Diphda 0524 076°20.5' 50°34.8' S 18°05.4' Antares 0530 201°26.0' 14°16.9' S 26°23.4' Deneb 0538 140°18.4' 22°00.3' N 45°12.6'Not learned 307. On 28 November your vessel's 0652 DR position is LAT 37°30'N, LONG 124°12'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 103° per standard magnetic compass. Variation in the area is 16.3°E. The chronometer reads 02h 54m 18s and is 02m 06s fast. What is the deviation of the compass?Not learned 308. On 28 November your vessel's 0712 zone time DR position is LAT 26° 54' S, LONG 45° 18' W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information. Chronometer time: 10h 09m 18s Chronometer error: slow 02m 54s Gyro bearing: 102°Not learned 309. On 28 October at 1754 ZT, your vessel's DR position is LAT 28° 30' N, LONG 63° 24' W. At this time, you obtain a sextant altitude (hs) of Polaris reading 28° 42.6', with an index error of 2.4' on the arc. Your chronometer reads 09h 50m 00s, and is 4m 14s slow. What is your latitude by Polaris, given a height of eye of 28 feet (8.5 meters)?Not learned 310. On 28 October morning twilight will occur around 0524 ZT. Your DR position is LAT 25°25.0' N, LONG 32°33.3' W. Considering their magnitude and location, which group will be the three stars best suited to observe for a star fix at star time?Not learned 311. On 28 September in DR position LAT 24°12.0'S, LONG 85°25.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 094°psc. The chronometer reads 11h 29m 42s and is 03m 30s slow. Variation in the area is 4°W. What is the deviation of the magnetic compass?Not learned 312. On 28 September in DR position LAT 27° 16.7' S, LONG 113° 27.2' W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 273° psc. The chronometer reads 01h 17m 26s and is 01m 49s slow. Variation in the area is 6° W. What is the deviation of the standard magnetic compass?Not learned 313. On 29 April your 0300 ZT DR position is LAT 28° 39' N, LONG 168° 03' E. You are on course 108° T at a speed of 22 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 314. On 29 April your 0530 zone time position was LAT 23° 04.0' S, LONG 162° 12.0' E. Your vessel was steaming on course 120° T at a speed of 9.0 knots. An observation of the Sun's upper limb was made at 0830 ZT. The chronometer read 09h 27m 32s and was slow 02m 24s. The observed altitude (Ho) was 24° 58.0'. LAN occurred at 1205 zone time. The observed altitude (Ho) was 52° 04.0'. What was the longitude of your 1200 zone time running fix?Not learned 315. On 29 April your 1913 zone time DR position is LAT 22°09.0'N, LONG 56°16.0'W. At that time you observe Polaris with a sextant altitude (hs) of 22°25.8'. The chronometer time of the sight is 11h 11m 14s, and the chronometer error is 02m 18s slow. The index error is 1.5' off the arc, and the height of eye is 61.5 feet. What is your latitude by Polaris?Not learned 316. On 29 July your 1930 zone time DR position is LONG 164°26.0'E. At that time you observe Polaris with a sextant altitude (hs) of 23°46.8'. The chronometer time of the sight is 08h 32m 18s, and the chronometer error is 02m 26s fast. The index error is 2.7' on the arc, and the height of eye is 56.0 feet. What is your latitude by Polaris?Not learned 317. On 29 June your 0800 zone time fix gives you a position of LAT 26°16.0'S, LONG 61°04.0'E. Your vessel is steaming a course of 079°T at a speed of 15.5 knots. An observation of the Sun's upper limb is made at 0905 zone time, and the observed altitude (Ho) is 25°20.1. The chronometer reads 05h 08m 12s, and the chronometer error is 02m 27s fast. Local apparent noon occurs at 1154 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 40°44.2'. Determine the vessel's 1200 zone time position.Not learned 318. On 29 June you observe the star Achernar at a sextant altitude (Hs) of 54° 18.9'. The index error is 4.7' off the arc. The height of eye is 58 feet. What is the observed altitude (Ho)?Not learned 319. On 29 October in DR position LAT 41°12.0'N, LONG 50°18.9'W, you take an ex-meridian observation of the Sun's lower limb, near upper transit. The chronometer time of the sight is 03h 21m 12s, and the chronometer error is 01m 50s slow. The sextant altitude (hs) is 34°54.2'. The index error is 2.0' on the arc, and your height of eye is 45 feet. What is the latitude at meridian transit?Not learned 320. On 3 April your vessel's 1400 ZT DR position is LAT 20°08.0' N, LONG 147°45.0' W. You are steering course 023°T at 18.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix. Body Zone Time GHA Observed Declination Altitude Capella 1848 195°07.8' 44°10.2' N 45°58.8' Sirius 1903 167°06.2' 46°52.9' S 16°41.7' Aldebaran 1912 201°44.0' 38°17.9' N 16°28.2'Not learned 321. On 3 December evening twilight for your vessel will occur at 1901 zone time. Your vessel's DR position will be LAT 24°18.5' S, LONG 110°30.6' W. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time?Not learned 322. On 3 February your 0451 zone time DR position is LAT 24°15.0'S, LONG 124°24.0'W. Considering their magnitude, azimuth and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 323. On 3 February your 0547 zone time DR position is LAT 24°18.5'N, LONG 167°25.0'E. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 324. On 3 February your 0550 zone time DR position is LAT 26°16.0' N, LONG 112°05.0' W. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?Not learned 325. On 3 January your 1759 zone time DR position is LONG 60°53.2' W. At that time you observe Polaris with a sextant altitude (hs) of 22°55.8'. The chronometer time of the sight is 09h 57m 10s, and the chronometer error is 02m 26s slow. The index error is 2.9' off the arc, and the height of eye is 52.5 feet. What is your latitude by Polaris?Not learned 326. On 3 May your 1009 zone time DR position is LAT 30°01.0'N, LONG 123°15.0'W. Your vessel is on course 330°T at a speed of 8.6 knots. What is the zone time of local apparent noon (LAN)?Not learned 327. On 3 October your 0330 zone time (ZD + 5) DR position is LAT 47°41'N, LONG 86°49'W. At that time, you observe Polaris bearing 357.5°pgc. The chronometer time of the observation is 08h 32m 04s, and the chronometer is 0m 27s slow. The variation is 5.5°W. What is the gyro error?Not learned 328. On 3 October your 0830 zone time DR position is LAT 26°15.0'S, LONG 73°16.0'E. Your vessel is on course 280°T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 329. On 3 October your 2122 ZT position is LAT 26°32'N, LONG 84°26'W. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman noted that he was heading 106°pgc and 107°psc. The variation is 0°. What is the deviation for that heading?Not learned 330. On 30 August your 0554 zone time (ZT) position was LAT 25° 39.0' S, LONG 31° 51.0' E. Your vessel was steaming on course 325° T at a speed of 15.0 knots. An observation of the Sun's lower limb was made at 0836 ZT. The chronometer read 06h 38m 36s and was fast 02m 24s. The observed altitude (Ho) was 30° 49.2'. LAN occurred at 1157 ZT. The observed altitude (Ho) was 56° 40.0'. What was the longitude of your 1157 ZT running fix?Not learned 331. On 30 August in DR position LAT 26°34.0'N, LONG 141°36.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 09h 15m 26s, and the chronometer error is 00m 00s. The sextant altitude (hs) is 71°41.7'. The index error is 3.2' off the arc, and your height of eye is 49.6 feet. What is the latitude at meridian transit?Not learned 332. On 30 December in DR position LAT 28° 24.0' S, LONG 32° 15.0' W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 02h 09m 16s, and the chronometer error is 00m 00s. The sextant altitude (hs) is 84° 03.3'. The index error is 3.5' off the arc, and your height of eye is 62.0 feet. What is the latitude at meridian transit?Not learned 333. On 30 July, your 0200 zone time (ZD +4) DR position is LAT 43°48'N, LONG 78°00 W. At that time, you observe Polaris bearing 008.7°psc. The chronometer time of the observation is 05h 58m 07s, and the chronometer is 0m 23s slow. The variation is 10.5°W. What is the deviation of the magnetic compass?Not learned 334. On 30 July your 1030 ZT DR position is LAT 17°46'N, LONG 139°30'W. You are on course 129°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun. Zone Time GHA Declination Ho 1220 138°25.0' N 18°22.3' 88°43.3' 1226 139°55.0' N 18°22.2' 88°24.0'Not learned 335. On 30 July your 1030 ZT DR position is LAT 19° 02' N, LONG 138° 12' W. You are on course 309° T, speed 24 knots. Determine your 1200 position using the following observations of the Sun. Zone Time GHA Declination Ho 1220 138°25.0' N 18°22.3' 88°43.3' 1226 139°55.0' N 18°22.2' 88°24.0'Not learned 336. On 30 June at 0630 zone time, morning stars were observed, and the vessel's position was determined to be LAT 25° 15.0' S, LONG 175° 36.0' E. Your vessel is steaming at 16.0 knots on a course of 302° T. A sextant observation of the Sun's lower limb is made at 1015 zone time. The chronometer reads 10h 14m 38s, and the sextant altitude is 32° 07.9'. The index error is 4.5' on the arc, and the chronometer error is 01m 25s slow. Your height of eye on the bridge is 58.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 337. On 30 March in DR position LAT 20°26.2'N, LONG 131°17.9'E, you take an ex-meridian observation of the Moon's lower limb at upper transit. The chronometer time of the sight is 10h 36m 02s, and the chronometer error is 02m 06s slow. The sextant altitude (hs) is 48°21.4'. The index error is 2.0' on the arc, and your height of eye is 40 feet. What is the latitude at meridian transit?Not learned 338. On 30 October an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1144 ZT. Your DR position is LAT 22° 42.0' S, LONG 137° 16.0' W, and your sextant altitude (hs) is 80° 59.4'. The index error is 2.5' off the arc, and your height of eye is 42.5 feet. The chronometer time of the observation is 08h 46m 15s, and the chronometer error is 02m 12s fast. Find the latitude at meridian transit from the ex-meridian observation.Not learned 339. On 31 January your 0920 zone time DR position is LAT 24°16.0'S, LONG 151°33.0'E. Your vessel is on course 258°T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)?Not learned 340. On 31 May your vessel's 1420 zone time DR position is LAT 29° 06' N, LONG 120° 06' W, when an azimuth of the Sun is observed. The bearing of the Sun per standard magnetic compass was 255.3°. The chronometer time of the observation is 10h 17m 24s. The chronometer error is 02m 32s slow. The variation for this area is 12.9° E. What is the deviation of the standard magnetic compass?Not learned 341. On 31 October your 1700 zone time DR position is LAT 27°17.0'N, LONG 116°10.0'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 246.5° per standard magnetic compass. Variation in the area is 8.5°E. The chronometer reads 01h 01m 23s and the chronometer error is 01m 54s slow. What is the deviation of the standard compass?Not learned 342. On 4 December your 1500 ZT DR position is LAT 18°06.0'N, LONG 75°42.0'W. You are on course 020°T at a speed of 15.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1548 running fix.Not learned 343. On 4 January your 0800 zone time DR position is LAT 25°25.0 S, LONG 16°09.0'W. Your vessel is on course 290°T at a speed of 13.5 knots. What is the zone time of local apparent noon (LAN)?Not learned 344. On 4 July at 0630 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°15.0'S, LONG 21°20.0'W. Your vessel is steaming at 13.0 knots on a course of 146°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 10h 14m 27s, and the sextant altitude is 25°29.8'. The index error is 3.1' off the arc, and the chronometer error is 0m 53s slow. Your height of eye on the bridge is 48.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 345. On 4 July you observe the lower limb of the Sun at a sextant altitude (hs) of 25° 29.8'. The index error is 3.1' off the arc. The height of eye is 48 feet (14.6 meters). What is the observed altitude (Ho)?Not learned 346. On 4 July your vessel's 1722 zone time DR position is LAT 34°30'S, LONG 174°48'E, when an amplitude of the Sun is observed. The sun's center is on the visible horizon and bears 282° per standard magnetic compass. Variation in the area is 17.2°E. The chronometer reads 05h 21m 48s and is 02m 01s fast. What is the deviation of the compass?Not learned 347. On 4 June at 0630 ZT, morning stars were observed, and the vessel's position was determined to be LAT 26° 15' S, LONG 121° 20' W. Your vessel is steaming at 13.0 knots on a course of 246° T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 05h 14m 27s, and the sextant altitude is 25° 57.8'. The index error is 2.1' off the arc, and the chronometer error is 0m 53s slow. Your height of eye is 39.0 feet. What is the azimuth (Zn) and intercept (a) of this sight using the assumed position method?Not learned 348. On 4 October, your 0734 zone time DR position is LAT 24°11.0'N, LONG 162°34.0'E. At that time, you observe the Sun bearing 105.5°psc. The chronometer reads 08h 36m 11s, and the chronometer error is 01m 46s fast. The variation is 7°W. What is the deviation of the standard compass?Not learned 349. On 4 September your 1813 zone time DR position is LAT 24° 18.0' S, LONG 95° 16.0' E. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?Not learned 350. On 5 April at 0509 zone time, morning stars were observed and the vessel's position was LAT 28°32'N, LONG 177°13.0'W. Your vessel is steaming at 19.0 knots on a course of 258°T. A sextant observation of the Sun's lower limb is made at 1021 zone time. The chronometer reads 10h 20m 09s, and the sextant altitude (hs) is 58°06.6'. The index error is 1.0' off the arc, and the chronometer error is 00m 54s slow. Your height of eye on the bridge is 55.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 351. On 5 August your 0310 ZT position is LAT 09° 02' N, LONG 21° 08' W. You observe Polaris bearing 002° pgc. At the time of the observation the helmsman noted that he was heading 316° pgc and 329° psc. The variation is 15° W. What is the deviation for that heading?Not learned 352. On 5 February your 2320 ZT position is LAT 52° 28' N, LONG 23° 48' W. You observe Polaris bearing 000.2° pgc. At the time of the observation the helmsman noted that he was heading 224° pgc and 244° psc. The variation is 20° W. What is the deviation for that heading?Not learned 353. On 5 June your 0420 zone time DR position is LAT 26°47.0' N, LONG 133°19.5' W. At that time, you observe Vega bearing 298.1°psc. The chronometer reads 01h 21m 17s, and the chronometer error is 02m 25s fast. The variation is 3.5°E. What is the deviation of the standard compass?Not learned 354. On 5 May your 1300 ZT DR position is LAT 25° 16.0' S, LONG 12° 30.0' W. You are on course 012° T at a speed of 14 knots. What will be the zone time of sunset at your vessel?Not learned 355. On 5 May your 1600 zone time DR position is LAT 17°28' S, LONG 143°39' E. You are on course 316°T at a speed of 17 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1800 running fix. Body Zone Time GHA Observed Declination Altitude Avoir 1727 209°18.2' 47°24.4' S 59°27.3' Regulus 1732 184°14.7' 46°35.2' N 12°03.6' Betelgeuse 1738 249°03.6' 49°41.5' N 7°24.1'Not learned 356. On 5 May your 1800 ZT DR position is LAT 26°11.5'N, LONG 65°35.0'W. You are on course 270°T at a speed of 12 knots. What will be the ZT of sunset at your vessel?Not learned 357. On 5 May at 1953 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 29°30.0'N, LONG 66°25.7'W, and your sextant reads 29°07.2'. Your chronometer reads 11h 51m 45s, and your chronometer error is 01m 36s slow. Your height of eye is 56 feet, and the index error for your sextant is 1.5' on the arc. What is the latitude of your vessel from your observation of Polaris?Not learned 358. On 5 May in DR position LAT 38°34.5'N, LONG 124°20.7'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 07h 59m 10s, and the chronometer error is 01m 10s slow. The sextant altitude (hs) is 67°27.0'. The index error is 1.4' on the arc, and your height of eye is 30 feet. What is the latitude at meridian transit?Not learned 359. On 5 September in DR position LAT 23° 17.0' S, LONG 154° 35.0' E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 275° per standard magnetic compass. The chronometer reads 07h 49m 26s and is 01m 52s fast. Variation in the area is 3° W. What is the deviation of the standard magnetic compass?Not learned 360. On 6 April your 0300 DR position is LAT 27° 42' S, LONG 128° 58' W. You are on course 097° T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. ZONE OBSERVED BODY TIME GHA ALTITUDE (Ho) DECLINATION ------------------- -------- ------------- ------------ --------------- Fomalhaut 0530 203° 08.6' 25° 17.5' S 29° 43.4' Rigil Kent. 0536 194° 12.4' 35° 26.6' S 60° 45.3' Vega 0540 135° 43.2' 23° 06.8' N 38° 45.7'Not learned 361. On 6 August your 1552 zone time DR position is LAT 24°26.0'S, LONG 73°19.0'E. At that time, you observe the Sun bearing 302°psc. The chronometer reads 10h 55m 07s, and the chronometer error is 02m 38s fast. The variation is 6°E. What is the deviation of the standard magnetic compass?Not learned 362. On 6 December your 0800 zone time DR position was LAT 21°48.0'N, LONG 124°30.0'E. Your vessel was steaming on course 045°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 1012 ZT. The chronometer read 02h 10m 42s and was slow 01m 02s. The observed altitude (Ho) was 41°17.1'. LAN occurred at 1129 zone time. The observed altitude (Ho) was 44°53.7'. What was the longitude of your 1200 zone time running fix?Not learned 363. On 6 March at 0550 zone time, morning stars were observed, and the vessel's position was determined to be LAT 23° 56.0' N, LONG 27° 19.0' W. Your vessel is steaming at 25.0 knots on a course of 149.0° T. A sextant observation of the Sun's lower limb is made at 0830 zone time. The chronometer reads 10h 32m 05s, and the sextant altitude is 31° 31.5'. The index error is 2.5' on the arc, and the chronometer error is 01m 45s fast. Your height of eye on the bridge is 76.0 feet. What is the azimuth (Zn) of this sight using the assumed position?Not learned 364. On 6 March your 1854 zone time DR position is LAT 23° 51.5' N, LONG 73° 14.0' W. At that time you observe Polaris with a sextant altitude (hs) of 24° 16.5'. The chronometer time of the sight is 11h 52m 40s, and the chronometer error is 01m 56s slow. The index error is 5.0' on the arc, and the height of eye is 43.5 feet (13.3 meters.) What is your latitude by Polaris?Not learned 365. On 6 November your 0752 zone time DR position is LAT 25° 11.0' N, LONG 76° 07.0' W. At that time, you observe the Sun bearing 119° psc. The chronometer reads 12h 53m 07s, and the chronometer error is 01m 19s fast. The variation is 3° W. What is the deviation of the standard magnetic compass?Not learned 366. On 6 November your vessel's 0706 zone time DR position is LAT 25° 30.0' N, LONG 85° 35.0' W, when an azimuth of the Sun is observed. The chronometer time of the sight is 01h 03m 30s, and the Sun is bearing 114.0° pgc. The chronometer error is 02m 30s slow, and the variation in the area is 2° W. What is the gyro error?Not learned 367. On 6 October your 0416 zone time DR position is LAT 25° 16.0' N, LONG 130° 25.0' E. At that time, you observe Mars bearing 083° psc. The chronometer reads 07h 16m 22s, and the chronometer error is 00m 10s fast. The variation is 1.5° E. What is the deviation of the standard compass?Not learned 368. On 7 April in DR position LAT 27°42.0'N, LONG 114°03.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 076°psc. The chronometer reads 02h 10m 17s and is 01m 52s slow. Variation in the area is 8°E. What is the deviation of the standard magnetic compass?Not learned 369. On 7 December your 0350 ZT position is LAT 35°42'N, LONG 17°38'E. You observe Polaris bearing 359.7°pgc. At the time of the observation the helmsman noted that he was heading 016°pgc and 014°psc. The variation is 1°E. What is the deviation for that heading?Not learned 370. On 7 December your vessel's 0835 zone time DR position is LAT 28° 30.0' N, LONG 125° 39.3' W, when an azimuth of the Sun is observed. The chronometer time of the sight is 04h 34m 48s, and the Sun is bearing 113° per standard magnetic compass. The chronometer error is 01m 24s slow, and the variation in the area is 13.0° E. What is the deviation of the standard magnetic compass?Not learned 371. On 7 February your 0800 zone time DR position is LAT 22°16.0'N, LONG 92°26.0'W. Your vessel is on course 270°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?Not learned 372. On 7 March at 1838 ZT, in DR position LAT 34°26.9' N, LONG 58°16.2' W, you observe Polaris for latitude. The sextant altitude (hs) is 35°08.4'. The index error is 2.5' off the arc. The height of eye is 54 feet. What is the latitude at the time of the sight?Not learned 373. On 7 May you observe Polaris for latitude at 0303 ZT. Your DR position is LAT 56° 35.4' N, LONG 05° 38.9' W. The sextant altitude is 56° 11.1'. The height of eye is 36', and the index error is 3.3' off the arc. What is the latitude at the time of the sight?Not learned 374. On 7 November your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 162°19.0'W. Your vessel is on course 289°T and your speed is 19.0 knots. Local apparent noon (LAN) occurs at 1138 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 45°35.0'. What is the latitude at 1200 ZT?Not learned 375. On 7 November your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 163°19.0'W. Your vessel is on course 289°T, and your speed is 19.0 knots. Local apparent noon (LAN) occurs at 1138 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 45°35.0'. What is the calculated latitude at LAN?Not learned 376. On 7 November your 0830 zone time position was LAT 27°36.0'N, LONG 162°19.0'W. Your vessel was steaming on course 289°T at a speed of 19.0 knots. An observation of the Sun's lower limb was made at 0945 ZT. The chronometer read 08h 43m 11s and was slow 01m 51s. The observed altitude (Ho) was 38°21.1'. Local Apparent Noon (LAN) occurred at 1138 zone time. The observed altitude (Ho) was 45°35.0'. What was the longitude of your 1200 zone time running fix?Not learned 377. On 8 April your evening DR position is LAT 22° 16' N, LONG 157° 58.3' W. You observe an unidentified star bearing 246° T at an observed altitude (Ho) of 58° 45.5'. The chronometer reads 05h 09m 57s, and is 01m 23s slow. What star did you observe?Not learned 378. On 8 April while taking observations for an evening fix, you observe an unidentified star bearing 250.7°T at an observed altitude of 51°44.8'. Your DR position at the time of the sight was LAT 22°16.0' N, LONG 157°58.3' W. The chronometer reads 05h 09m 57s and is 01m 23s slow. What star did you observe?Not learned 379. On 8 August your 0400 ZT DR position is LAT 23°16.0'S, LONG 105°33.0'W. You are on course 295°T at a speed of 25 knots. What will be the zone time of sunrise at your vessel?Not learned 380. On 8 August at 0545 ZT, morning stars were observed, and the vessel's position was determined to be LAT 26° 16.0' S, LONG 94° 16.0' E. Your vessel is steaming at 20.0 knots on a course of 346° T. A sextant observation of the Sun's lower limb is made at 0905 ZT. The chronometer reads 03h 02m 52s, and the sextant altitude (hs) is 38° 07.5'. The index error is 5.2' off the arc, and the chronometer error is 2m 17s slow. Your height of eye on the bridge is 72 feet (22.0 meters). What is the observed altitude (Ho) and azimuth (Zn) of this sight using the assumed position?Not learned 381. On 8 December in DR position LAT 21°56.1'S, LONG 17°21.6'E you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 240.5°psc. The chronometer reads 05h 27m 21s and is 00m 47s fast. Variation in the area is 3.3°E. What is the deviation of the standard magnetic compass?Not learned 382. On 8 February your 0800 zone time position is LAT 21°55'S, LONG 52°27'W. Your vessel is on course 056°T at a speed of 17.5 knots. An observation of the Sun's lower limb is made at 0938 zone time, and the observed altitude (Ho) is 46°06.5'. The chronometer reads 12h 37m 23s, and the chronometer error is 1m 24s slow. LAN occurs at 1243 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 83°56.1'. Determine the vessel's 1200 zone time position.Not learned 383. On 8 February your 0800 zone time (ZT) position was LAT 28° 55.0' S, LONG 52° 27.0' W. Your vessel was steaming on course 036° T at a speed of 19.0 knots. An observation of the Sun's lower limb was made at 0938 ZT. The chronometer read 12h 37m 23s and was slow 01m 24s. The observed altitude (Ho) was 45° 29.2'. Local Apparent Noon (LAN) occurred at 1240 ZT. The observed altitude (Ho) was 77° 10.5'. What was the longitude of your 1200 ZT running fix?Not learned 384. On 8 May in DR position LAT 30° 26.0' N, LONG 46° 55.1' W, you take an ex-meridian observation of Dubhe. The chronometer time of the sight is 11h 10m 54s, and the chronometer error is 01m 18s slow. The sextant altitude (hs) is 58° 35.0'. The index error is 1.5' on the arc, and your height of eye is 44 feet. What is the latitude at meridian transit?Not learned 385. On 9 February your 0739 zone time DR position is LAT 23°31.0'N, LONG 143°41.0'E. At that time, you observe the Sun bearing 104.5°psc. The chronometer reads 09h 37m 12s, and the chronometer error is 01m 52s slow. The variation is 3.5°W. What is the deviation of the standard magnetic compass?Not learned 386. On 9 February your 0830 zone time DR position is LAT 22° 19.0' N, LONG 64° 37.0' E. Your vessel is on course 128° T at a speed of 19.0 knots. What is the zone time of local apparent noon?Not learned 387. On 9 May your vessel's 1809 ZT DR position is LAT 48° 13.7' N, LONG 168° 36.3' E, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 283.7° per standard magnetic compass. Variation in the area is 13.0° E. The chronometer reads 07h 13m 19s and is 02m 56s fast. What is the deviation of the standard compass?Not learned 388. On 9 November your 0400 DR position is LAT 18° 24.0' S, LONG 97° 36.0' W. You are on course 138° T at a speed of 16 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. ZONE OBSERVED BODY TIME GHA ALTITUDE (Ho) DECLINATION ------------------- -------- ------------- ------------ --------------- Canopus 0510 120° 08.7' 51° 31.4' S 52° 40.9' Aldebaran 0512 147° 49.1' 29° 07.8' N 16° 28.4' Regulus 0514 065° 11.7' 45° 57.5' N 12° 03.5'Not learned 389. On 9 November at 0426 ZT, your position was LAT 25° 17.0' S, LONG 154° 16.0' E. Your vessel is steaming at 14.0 knots on course 066° T. A sextant observation of the Sun's lower limb is made at 0837 ZT. The chronometer reads 10h 35m 21s, and the sextant altitude (hs) is 50° 26.9'. The index error is 1.5' on the arc, and the chronometer error is 01m 48s slow. Your height of eye on the bridge is 56.0 feet. What is the observed altitude (Ho) and azimuth (Zn) of this sight using the assumed position?Not learned 390. On 9 September your 2043 ZT position is LAT 24°18'N, LONG 66°46'W. You observe Polaris bearing 001°pgc. At the time of the observation the helmsman noted that he was heading 031°pgc and 040°psc. The variation is 11°W. What is the deviation for that heading?Not learned 391. You depart LAT 15°48'N, LONG 174°06'E and steam 905 miles on course 090°. What is the LONG of arrival?Not learned 392. You depart LAT 16° 24' S, LONG 169° 38' W, for LAT 16° 24' S, LONG 174° 52' E. What are the course and distance by parallel sailing?Not learned 393. You depart LAT 22° 35.0' N, LONG 157° 30.0' W, and steam 4505.0 miles on course 135° T. What are the latitude and longitude of your arrival by Mercator sailing?Not learned 394. You depart LAT 25°54'N, LONG 9°38'E and steam 592 miles on course 270°. What is the longitude of arrival?Not learned 395. You depart LAT 26°03'S, LONG 10°28'E, for LAT 26°03'S, LONG 01°16'W. What are the course and distance by parallel sailing?Not learned 396. You depart LAT 28°55.0'N, LONG 89°10.0'W, enroute to LAT 24°25.0'N, LONG 83°00.0'W. What is the true course and distance by mid-latitude sailing?Not learned 397. You depart LAT 32° 16.6' N, LONG 68° 28.0' W. What is the course and distance as calculated by Mercator sailing to a position at LAT 43° 12.2' N, LONG 55° 39.0' W?Not learned 398. You depart LAT 33°45.0'N, LONG 118°30.0'W, and steam 2216 miles on course 250°T. What is the longitude of your arrival by Mercator sailing?Not learned 399. You depart LAT 34° 22' S, LONG 18° 23' E, and steam 3174 miles on course 282° T. What is the longitude of your arrival by Mercator sailing?Not learned 400. You depart LAT 37° 36' N, LONG 123° 00' W, and steam 2022 miles on course 241° T. What is the longitude of your arrival by Mercator sailing?Not learned 401. You depart LAT 38°12'S, LONG 12°06'W and steam 1543 miles on course 270°. What is the Longitude of arrival?Not learned 402. You depart LAT 38°14'N, LONG 12°42'W, for LAT 38°14'N, LONG 46°09'W. What are the course and distance by parallel sailing?Not learned 403. You depart LAT 40°42.0'N, LONG 74°01.0'W, and steam 3365.6 miles on course 118°T. What is the longitude of your arrival by Mercator sailing?Not learned 404. You depart LAT 49°38'N, LONG 152°49'E, for LAT 49°38'N, LONG 176°12'E. What are the course and distance by parallel sailing?Not learned 405. You depart LAT 49°45.0'N, LONG 06°35.0'W, and steam 3599 miles on course 246.5°T. What is the longitude of your arrival by Mercator sailing?Not learned 406. You depart LAT 50°06.0'N, LONG 153°06.0'E and steam 879 miles on course 090°. What is the LONG of arrival?Not learned 407. You depart LAT 51°48.0'S, LONG 178°35.0'W and steam 179 miles on course 270°. What is the longitude of arrival?Not learned 408. You depart LAT 52°01'N, LONG 176°09'E, for LAT 52°01'N, LONG 178°46'W. What are the course and distance by parallel sailing?Not learned 409. You desire to make good a true course of 157°. The variation is 15°E, magnetic compass deviation is 9°W, and gyrocompass error is 3°E. A southwesterly wind produces a 2° leeway. What is the course to steer per standard magnetic compass to make the true course good?Not learned 410. Determine the distance from LAT 19°54.0'N, LONG 166°36.0'E to LAT 19°54.0'N, LONG 157°54.0'W, by parallel sailing.Not learned 411. Determine the distance from LAT 23°24'S, LONG 13°54'E to LAT 23°24'S, LONG 42°48'W, by parallel sailing.Not learned 412. Determine the distance from LAT 34° 18' S, LONG 172° 40' E to LAT 34° 18' S, LONG 152° 38' E, by parallel sailing.Not learned 413. Determine the distance from LAT 59°12'N, LONG 14°00'W to LAT 59°12'N, LONG 03°20'W, by parallel sailing.Not learned 414. Determine the distance from LAT 63°54.0'N, LONG 04°52.0'E to LAT 63°54.0'N, LONG 18°24.0'W by parallel sailing.Not learned 415. Determine the great circle distance and initial course from LAT 08°36.0'N, LONG 126°17.0'E to LAT 02°12.0'S, LONG 81°53.0'W.Not learned 416. Determine the great circle distance and initial course from LAT 08°53.0'N, LONG 79°31.0'W to LAT 33°51.5'S, LONG 151°13.0'E.Not learned 417. Determine the great circle distance and initial course from LAT 24° 52.0' N, LONG 78° 27.0' W to LAT 47° 19.0' N, LONG 06° 42.0' W.Not learned 418. Determine the great circle distance and initial course from LAT 25°47.0'N, LONG 79°59.5'W to LAT 38°42.0'N, LONG 09°10.5'W.Not learned 419. Determine the great circle distance and initial course from LAT 25° 50.0' N, LONG 77° 00.0' W to LAT 35° 56.0' N, LONG 06° 15.0' W.Not learned 420. Determine the great circle distance and initial course from LAT 26°00.0'S, LONG 56°00.0'W to LAT 34°00.0'S, LONG 18°15.0'E.Not learned 421. Determine the great circle distance and initial course from LAT 27° 51.0' N, LONG 71° 41.0' W to LAT 49° 45.0' N, LONG 06° 14.0' W.Not learned 422. Determine the great circle distance and initial course from LAT 31°57.0'S, LONG 115°52.0'E to LAT 24°47.0'N, LONG 66°59.0'E.Not learned 423. Determine the great circle distance and initial course from LAT 33° 53.3' S, LONG 18° 23.1' E to LAT 40° 27.0' N, LONG 73° 49.4' W.Not learned 424. Determine the great circle distance and initial course from LAT 34°51.0'N, LONG 115°01.2'E to LAT 10°16.0'S, LONG 51°42.6'E.Not learned 425. Determine the great circle distance and initial course from LAT 35°08.0'S, LONG 19°26.0'E to LAT 33°16.0'S, LONG 115°36.0'E.Not learned 426. Determine the great circle distance and initial course from LAT 35°17.6'N, LONG 144°23.0'E to LAT 47°36.0'N, LONG 124°22.0'W.Not learned 427. Determine the great circle distance and initial course from LAT 35°27.0'N, LONG 140°20.5'E to LAT 47°51.0'N, LONG 122°51.0'W.Not learned 428. Determine the great circle distance and initial course from LAT 37° 47.5' N, LONG 122° 27.8' W to LAT 33° 51.7' S, LONG 151° 12.7' E.Not learned 429. Determine the great circle distance and initial course from LAT 38°42.0'N, LONG 09°10.5'W to LAT 32°05.0'N, LONG 81°05.0'W.Not learned 430. Determine the great circle initial course from LAT 07° 05.0' N, LONG 81° 45.0' W to LAT 21° 15.0' N, LONG 157° 40.0' W.Not learned 431. Determine the great circle initial course from LAT 29° 46.0' S, LONG 30° 26.0' E to LAT 31° 52.0' S, LONG 115° 22.0' E.Not learned 432. Determine the great circle initial course from LAT 37° 12.6' S, LONG 73° 58.0' W to LAT 10° 33.0' S, LONG 142° 08.0' ENot learned 433. During evening twilight on 28 December a sextant altitude (hs) of the planet Venus was 29° 43.2'. The height of eye was 40 feet, and the index error was 2.0' on the arc. What was the observed altitude (Ho)?Not learned 434. The great circle distance from LAT 08° 50.0' N, LONG 80° 21.0' W to LAT 12° 36.0' N, LONG 128° 16.0' E is 8664 miles, and the initial course is 306.6° T. Determine the latitude of the vertex.Not learned 435. The great circle distance from LAT 08° 50.0' N, LONG 80° 21.0' W to LAT 22° 36.0' N, LONG 128° 16.0' E is 7801 miles and the initial course is 318° 45' T. The latitude of the vertex is 49° 20.6' N. What is the longitude of the vertex?Not learned 436. The great circle distance from LAT 24°25.3'N, LONG 83°02.6'W to LAT 35°57.2'N, LONG 5°45.7'W is 3966.5 miles. Determine the latitude of the vertex.Not learned 437. The great circle distance from LAT 25°50'N, LONG 77°00'W to LAT 35°56'N, LONG 06°15'W is 3616 miles, and the initial course is 061.7°T. Determine the latitude of the vertex.Not learned 438. The great circle distance from LAT 25°50'N, LONG 77°00'W to LAT 35°56'N, LONG 06°15'W is 3616 miles, and the initial course is 061.7°T. Determine the longitude of the vertex, given the latitude of the vertex as 37°34.9'N.Not learned 439. The great circle distance from LAT 25° 50' N, LONG 77° 00' W to LAT 35° 56' N, LONG 06° 15' W is 3616 miles, and the initial course is 061.7° T. The position of the vertex is LAT 37° 34.9' N, LONG 25° 59.0' W. Determine the latitude intersecting the great circle track 600 miles west of the vertex, along the great circle track.Not learned 440. The great circle distance from LAT 25° 50' N, LONG 77° 00' W to LAT 35° 56' N, LONG 06° 15' W is 3616 miles, and the initial course is 061.7° T. The position of the vertex is LAT 37° 34.9' N, LONG 25° 59.0' W. The difference of longitude from the vertex to a point (X) on the great circle track is 10° W. Determine the latitude which intersects the great circle at point (X).Not learned 441. The great circle distance from LAT 35° 08.0' S, LONG 19° 26.0' E to LAT 33° 16.0' S, LONG 115° 36.0' E is 4559 miles and the initial course is 121° T. Determine the latitude of the vertex.Not learned 442. The great circle distance from LAT 35° 08.0' S, LONG 19° 26.0' E to LAT 33° 16.0' S, LONG 115° 36.0' E is 4559 miles and the initial course is 121° T. Determine the longitude of the vertex.Not learned 443. The great circle distance from LAT 35° 57.2' N, LONG 05° 45.7' W to LAT 24° 25.3' N, LONG 83° 02.6' W is 3966.5 miles and the initial course is 283.7° T. The latitude of the vertex is 38° 09.4' N. What is the longitude of the vertex?Not learned 444. The great circle distance from LAT 38°17'N, LONG 123°16'W to LAT 35°01'N, LONG 142°21'E is 4330 miles, and the initial course is 300.9°T. Determine the latitude of the vertex.Not learned 445. The great circle distance from LAT 38°17.0'N, LONG 123°16.0'W to LAT 35°01.0'N, LONG 142°21.0'E is 4330 miles and the initial course is 300.9°T. The latitude of the vertex is 47°40.5'N. What is the longitude of the vertex?Not learned 446. You are on a great circle track departing from LAT 25°50.0'N, LONG 77°00.0'W and your initial course is 061.7°T. The position of the vertex is LAT 37°35.6'N, LONG 25°57.8'W. What is the distance along the great circle track between the point of departure and the vertex?Not learned 447. You are on a great circle track departing from position LAT 25°50'N, LONG 77°00'W. The position of the vertex is LAT 37°35.6'N, LONG 25°57.8'W. The distance along the great circle track from the vertex to a point (X) is 600 miles westward. Determine the position of point (X) on the great circle track.Not learned 448. A great circle track would be most advantageous when compared to the rhumb line track on which route? (Use gnomonic tracking chart WOXZC 5274)Not learned 449. You are keeping ZD +4 on your vessel. On 21 June at 0906 DST, your position is LAT 30°48.0'N, LONG 71°00.0'W. You are on a course of 167°T at 15.2 knots. At what time will local apparent noon (LAN) occur ZT at your vessel? You are keeping DST.Not learned 450. On May 20 your 2300, (ZD +4), DR position is LAT 42° 07' N, LONG 81° 02' W. At that time, you observe Polaris bearing 012° psc. The chronometer time of the observation is 03h 02m 23s, and the chronometer is 1m 17s fast. The variation is 9.5° W. What is the deviation of the magnetic compass?Not learned 451. On a North Pacific voyage, you wish to sail the shortest distance from LAT 46° 05' N, LONG 124° 00' W to LAT 44° 00' N, LONG 150° 00' E. You do not want to exceed 50° N latitude due to anticipated fog conditions. Which voyage plot meets these requirements? (Use gnomonic tracking chart WOXZC 5270)Not learned 452. You observe the lower limb of the Sun at a sextant altitude (hs) of 22°58.6' on 16 June. The index error is 2.0' off the arc. The height of eye is 61 feet. What is the observed altitude (Ho)?Not learned 453. You observe the lower limb of the Sun at a sextant altitude (hs) of 24° 00.7' on 10 January. The index error is 2.6' off the arc. The height of eye is 55 feet. What is the observed altitude (Ho)?Not learned 454. You observe the lower limb of the Sun at a sextant altitude (hs) of 28°24.7' on 17 May. The index error is 1.5' off the arc. The height of eye is 86 feet (26 meters). What is the observed altitude (Ho)?Not learned 455. You observe the lower limb of the Sun at a sextant altitude (hs) of 31°31.5' on 6 March. The index error is 2.5' on the arc. The height of eye is 76 feet. What is the observed altitude (Ho)?Not learned 456. You observe the lower limb of the Sun at a sextant altitude (hs) of 34°51.4' on 18 October. The index error is 2.0' off the arc. The height of eye is 54 feet (16.5 meters). What is the observed altitude (Ho)?Not learned 457. You observe the lower limb of the Sun at a sextant altitude (hs) of 35° 26.3' on 25 June. The index error is 1.5' on the arc. The height of eye is 58 feet (17.6 meters). What is the observed altitude (Ho)?Not learned 458. You observe the lower limb of the Sun at a sextant altitude (hs) of 37°47.2' on 11 October. The index error is 3.0' off the arc. The height of eye is 63 feet (19.2 meters). What is the observed altitude (Ho)?Not learned 459. You observe the lower limb of the Sun at a sextant altitude (hs) of 38°07.5' on 8 August. The index error is 5.2' off the arc. The height of eye is 72 feet (22 meters). What is the observed altitude (Ho)?Not learned 460. You observe the lower limb of the Sun at a sextant altitude (hs) of 41°29.8' on 11 January. The index error is 2.4' off the arc. The height of eye is 68 feet. What is the observed altitude (Ho)?Not learned 461. You observe the lower limb of the Sun at a sextant altitude (hs) of 42° 44.0' on 22 June. The index error is 0.8' off the arc. The height of eye is 70 feet (21.3 meters). What is the observed altitude (Ho)?Not learned 462. You observe the lower limb of the Sun at a sextant altitude (hs) of 45°49.7' on 13 November. The index error is 1.0' on the arc. The height of eye is 61 feet (18.6 meters). What is the observed altitude (Ho)?Not learned 463. You observe the lower limb of the Sun at a sextant altitude (hs) of 46° 20.3' on 1 April. The index error is 4.5' off the arc. The height of eye is 57 feet (17.4 meters). What is the observed altitude (Ho)?Not learned 464. You observe the lower limb of the Sun at a sextant altitude (hs) of 50° 26.9' on 9 November. The index error is 1.5' on the arc. The height of eye is 56 feet (17 meters). What is the observed altitude (Ho)?Not learned 465. You observe the lower limb of the Sun at a sextant altitude (hs) of 54° 28.2' on 22 July. The index error is 1.5' off the arc. The height of eye is 56 feet (17.1 meters). What is the observed altitude (Ho)?Not learned 466. You observe the lower limb of the Sun at a sextant altitude (hs) of 58° 06.6' on 5 April. The index error is 1.0' off the arc. The height of eye is 55 feet (16.8 meters). What is the observed altitude (Ho)?Not learned 467. You observe the lower limb of the Sun at a sextant altitude (hs) of 62° 22.2' on 6 June. The index error is 1.2' on the arc. The height of eye is 28 feet (8.5 meters). What is the observed altitude (Ho)?Not learned 468. You observe the lower limb of the Sun at a sextant altitude (hs) of 75° 12.3' on 6 August. The index error is 1.5' off the arc. The height of eye is 32 feet (9.8 meters). What is the observed altitude (Ho)?Not learned 469. You observe the planet Jupiter at a sextant altitude (hs) of 66° 27.6' on 26 May. The index error is 5.2' on the arc. The height of eye is 52 feet. What is the observed altitude (Ho)?Not learned 470. You observe the planet Saturn at a sextant altitude (hs) of 63° 05.1' on 25 May. The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?Not learned 471. You observe the star Antares at a sextant altitude (hs) of 38° 18.7' on 28 February. The index error is 2.4' on the arc. The height of eye is 40 feet (12.2 meters). What is the observed altitude (Ho)?Not learned 472. You observe the star Deneb at a sextant altitude (hs) of 48°34.8' on 16 December. The index error is 4.0' off the arc. The height of eye is 58 feet. What is the observed altitude (Ho)?Not learned 473. In planning a North Pacific voyage, you wish to steam the minimum distance from LAT 48° 30' N, LONG 124° 45' W to LAT 44° 00' N, LONG 150° 00' E, while remaining south of 51° N latitude. Which track meets these requirements? (Use gnomonic tracking chart WOXZC 5270)Not learned 474. You are planning a voyage from Cape May (LAT 38°45'N, LONG 74°45'W) to Lisbon (LAT 38°37'N, LONG 09°45'W). Which of the following is TRUE? (Use gnomonic chart WOXZC 5274)Not learned 475. You are planning a voyage from departure Seattle (LAT 48°30'N, LONG 125°00'W) to a position at LAT 44°00'N, LONG 161°00'E. Which statement is TRUE? (Use gnomonic chart WOXZC 5270.)Not learned 476. You are planning a voyage from Godthab, Greenland, to Cayenne, French Guiana. Using chart WOXZC 5274, determine which statement is TRUE.Not learned 477. You are planning a voyage by great circle from LAT 38° 00' N, LONG 73° 00' W to LAT 49° 00' N, LONG 06° 00' W. Which of the following statements is TRUE? (Use gnomonic tracking chart WOXZC 5274)Not learned 478. You are planning a voyage by great circle from LAT 59° 00' N, LONG 07° 00' W via LAT 38° 00' N, LONG 61° 30' W. Which of the following statements is TRUE? (Use gnomonic tracking chart WOXZC 5274)Not learned 479. You are planning a voyage by great circle from the mouth of the Delaware River (LAT 38°40'N, LONG 75°00'W) to Lisbon, Portugal. Which statement is TRUE? (Use gnomonic tracking chart WOXZC 5274.)Not learned 480. You are planning a voyage by great circle to Reykjavik, Iceland, via Cape Race, Newfoundland, LAT 46°30'N, LONG 53°00'W. Which statement is TRUE? (Use gnomonic tracking chart WOXZC 5274)Not learned 481. You are planning a voyage by great circle from Reykjavik (LAT 63° 30' N, LONG 24° 00' W) to the Azores (LAT 39° 30' N, LONG 29° 00' W). Which statement is TRUE? (Use gnomonic tracking chart WOXZC 5274)Not learned 482. You are planning a voyage from Jacksonville, FL, to the Strait of Gibraltar. Using chart WOXZC 5274, determine which statement is TRUE.Not learned 483. You are planning a voyage from LAT 48°30'N, LONG 125°00'W to Korea via LAT 48°30'N, LONG 153°00'E. Which of the following track lines would you select for the safest and most direct route? (Use gnomonic tracking chart WOXZC 5270)Not learned 484. You are planning a voyage between Portland, LAT 46° 05' N, LONG 124° 00' W, and Korea via LAT 44° 00' N, LONG 155° 00' E. Which statement is TRUE? (Use gnomonic tracking chart WOXZC 5270)Not learned 485. You receive a distress call from a vessel reporting her position as LAT 30°21'N, LONG 88°34'W. Your position is LAT 24°30'N, LONG 83°00'W. Determine the true course and distance to the distress scene by Mercator sailing.Not learned 486. On September 9 your 2130 zone time (ZD +5) DR position is LAT 45°08'N, LONG 82°38'W. At that time, you observe Polaris bearing 000.5°pgc. The chronometer time of the observation is 02h 26m 09s, and the chronometer is 1m 43s slow. The variation is 8.7°W. What is the gyro error?Not learned 487. Which statement about a great circle track between Cape Flattery (LAT 48°30'N, LONG 125°00'W) and Guam (LAT 14°00'N, LONG 145°00'E) is TRUE? (Use gnomonic tracking chart WOXZC 5270)Not learned 488. On Sunday, 8 November, your ship is enroute from Texas City, TX, to Portland, ME. At 0632 ZT, you fix your position at LAT 27°06'N, LONG 90°36'W. When the lower limb of the Sun was two-thirds of a diameter above the visible horizon, the Sun bore 105° per standard magnetic compass. At this time the chronometer read 12h 39m 20s and is 3m 20s slow. If the variation is 3°E, determine the deviation of the standard compass.Not learned 489. During twilight on 28 December around 1800 GMT, in DR position LAT 4°00'N, LONG 0°06'W, the sextant altitude (hs) of Venus was 30°46.8'. The height of eye was 36 feet, and the index error was 2.0' on the arc. The temperature was 68°F. The barometer read 1030 mb. Calculate the observed altitude (Ho).Not learned 490. Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from San Francisco to San Bernardino Strait (LAT 13°00'N, LONG 125°30'E) is TRUE.Not learned 491. Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from Valdez, AK, to Hilo, HI, is TRUE.Not learned 492. The vessel's course is 116°psc, the variation for the locality is 25°W and the deviation is 6°W. What is the true course made good if a northerly wind produces 1° leeway?Not learned 493. Your vessel departs LAT 32°45'N, LONG 79°50'W, and is bound for LAT 34°21'S, LONG 18°29'E. Determine the distance by Mercator sailing.Not learned 494. A vessel at LAT 07°05'N, LONG 81°45'W is to proceed to LAT 08°40'N, LONG 88°00'W. What are the course and distance by mid-latitude sailing?Not learned 495. A vessel at LAT 10° 22.0' S, LONG 7° 18.0' E, heads for a destination at LAT 6° 52.0' N, LONG 57° 23.0' W. Determine the true course and distance by Mercator sailing.Not learned 496. A vessel at LAT 11°22'S, LONG 009°18'E heads for a destination at LAT 06°52'N, LONG 57°23'W. Determine the true course and distance by Mercator sailing.Not learned 497. A vessel at LAT 14°10'N, LONG 61°00'W is to proceed to LAT 10°00'N, LONG 53°23'W. What is the course and distance by mid-latitude sailing?Not learned 498. A vessel at LAT 18° 54' N, LONG 73° 00' E, heads for a destination at LAT 13° 12' N, LONG 54° 00' E. Determine the true course and distance by Mercator sailing.Not learned 499. A vessel at LAT 20°00'N, LONG 107°30'W is to proceed to LAT 24°40'N, LONG 112°30'W. What is the course and distance by mid-latitude sailing?Not learned 500. A vessel at LAT 20° 10' N, LONG 122° 00' E is to proceed to LAT 26° 18' N, LONG 128° 20' E. What are the course and distance by mid-latitude sailing?Not learned 501. A vessel at LAT 21° 18.5' N, LONG 157° 52.2' W, heads for a destination at LAT 8° 53.0' N, LONG 79° 31.0' W. Determine the true course and distance by Mercator sailing.Not learned 502. A vessel at LAT 21° 32' N, LONG 160° 30' W, heads for a destination at LAT 30° 00' N, LONG 150° 00' E. Determine the true course and distance by Mercator sailing.Not learned 503. A vessel at LAT 28°00'N, LONG 116°00'W is to proceed to LAT 34°00'N, LONG 123°40'W. What is the course and distance by mid-latitude sailing?Not learned 504. A vessel at LAT 28°20'N, LONG 16°00'W is to proceed to LAT 21°00'N, LONG 18°00'W. What is the course and distance by mid-latitude sailing?Not learned 505. A vessel at LAT 29° 38.0' N, LONG 93° 49.0' W, heads for a destination at LAT 24° 38.0' N, LONG 82° 55.2' W. Determine the true course and distance by Mercator sailing.Not learned 506. A vessel at LAT 32° 05.0' N, LONG 81° 06.0' W, heads for a destination at LAT 35° 57.0' N, LONG 5° 45.0' W. Determine the distance by Mercator sailing.Not learned 507. A vessel at LAT 32°14.7'N, LONG 66°28.9'W, heads for a destination at LAT 36°58.7'N, LONG 75°42.2'W. Determine the distance by Mercator sailing.Not learned 508. A vessel at LAT 32° 14.7' N, LONG 66° 28.9' W, heads for a destination at LAT 36° 58.7' N, LONG 75° 42.2' W. Determine the true course by Mercator sailing.Not learned 509. A vessel at LAT 33°45'N, LONG 118°30'W, heads for a destination at LAT 21°15'N, LONG 157°36'W. Determine the true course and distance by Mercator sailing.Not learned 510. A vessel at LAT 38° 03.0' S, LONG 49° 38.0' W, heads for a destination at LAT 41° 26.0' S, LONG 38° 32.0' W. Determine the true course by Mercator sailing.Not learned 511. A vessel at LAT 38°36'N, LONG 11°36'W, heads for a destination at LAT 24°16'N, LONG 71°52'W. Determine the true course and distance by Mercator sailing.Not learned 512. A vessel at LAT 40°42.0'N, LONG 74°01.0'W, heads for a destination at LAT 14°41.0'N, LONG 17°26.0'W. Determine the true course and distance by Mercator sailing.Not learned 513. A vessel at LAT 45° 36.0' N, LONG 11° 36.0' W, heads for a destination at LAT 24° 16.0' N, LONG 73° 52.0' W. Determine the true course and distance by Mercator sailing.Not learned 514. A vessel at LAT 49° 45' N, LONG 6° 35' W, heads for a destination at LAT 25° 50' N, LONG 77° 00' W. Determine the true course and distance by Mercator sailing.Not learned 515. Your vessel receives a distress call from a vessel reporting her position as LAT 35°01'S, LONG 18°51'W. Your position is LAT 30°18'S, LONG 21°42'W. Determine the true course from your vessel to the vessel in distress by Mercator sailing.Not learned 516. Your vessel receives a distress call from a vessel reporting her position as LAT 35°01.0'S, LONG 18°51.0'W. Your position is LAT 35°01.0'S, LONG 21°42.0'W. Determine the true course and distance from your vessel to the vessel in distress by parallel sailing.Not learned 517. Your vessel receives a distress call from a vessel reporting her position at LAT 5° 24' N, LONG 31° 16' W. Your position is LAT 2° 39' S, LONG 39° 24' W. Determine the distance from your vessel to the vessel in distress by Mercator sailing.Not learned 518. A vessel steams 1082 miles on course 047° T from LAT 37° 18.0' N, LONG 24° 40.0' W. What is the latitude and longitude of the point of arrival by Mercator sailing?Not learned 519. A vessel steams 1106 miles on course 249°T from LAT 13°30.0'N, LONG 144°30.3'E. What is the latitude and longitude of the point of arrival by Mercator sailing?Not learned 520. A vessel steams 1650 miles on course 077°T from LAT 12°47'N, LONG 45°10'E. What is the latitude and longitude of the point of arrival by Mercator sailing?Not learned 521. A vessel steams 3312 miles on course 282°T from LAT 34°24'S, LONG 18°18'E. What is the latitude and longitude of the point of arrival by Mercator sailing?Not learned 522. A vessel steams 576 miles on course 260°T from LAT 40°36'N, LONG 50°24'W. What are the latitude and longitude of the point of arrival by mid-latitude sailing?Not learned 523. A vessel steams 580 miles on course 083°T from LAT 13°12'N, LONG 71°12'W. What are the latitude and longitude of the point of arrival by mid-latitude sailing?Not learned 524. A vessel steams 640 miles on course 047°T from LAT 34°45'N, LONG 140°00'E. What are the latitude and longitude of the point of arrival by mid-latitude sailing?Not learned 525. A vessel steams 666 miles on course 135°T from LAT 40°24.0'N, LONG 74°30.0'W. What is the latitude and longitude of the point of arrival by Mercator sailing?Not learned 526. A vessel steams 666 miles on course 295°T from LAT 24°24'N, LONG 83°00'W. What are the latitude and longitude of the point of arrival by mid-latitude sailing?Not learned 527. A vessel steams 720 miles on course 058°T from LAT 30°06.0'S, LONG 31°42.0'E. What are the latitude and longitude of the point of arrival by mid-latitude sailing?Not learned 528. You are on a voyage from Cape May (LAT 39° 50' N, LONG 74° 45' W) to the English Channel (LAT 49° 00' N, LONG 05° 00' W). What will NOT prohibit the use of a great circle track from departure to arrival? (Use gnomonic chart WOXZC 5274.)Not learned 529. Your voyage commences off Cape May, NJ, at LAT 38° 40' N, LONG 74° 00' W, for LAT 44° 00' N, LONG 10° 00' W. Sea ice is north of 45° N and west of 45° W. Extensive naval exercises will be conducted within a 150-mile radius of LAT 50° 00' N, LONG 35° 00' W. Which statement about a direct great circle route is TRUE? (Use gnomonic tracking chart WOXZC 5274.)Not learned 530. You are on a voyage from Nome to Honolulu via Unimak Pass (LAT 54° 30' N, LONG 164° 30' W). The great circle track passes through a point at LAT 38° 00' N, LONG 161° 40' W. Using gnomonic chart WOXZC 5270, determine which answer is TRUE. (The great circle distance, Unimak Pass to Honolulu, is 2013 miles.)Not learned 531. You are on a voyage via position LAT 44° 00' N, LONG 150° 00' E to LAT 46° 15' N, LONG 124° 00' W. Using gnomonic chart WOXZC 5270, determine which statement is TRUE?Not learned 532. On a voyage via the southern tip of Nova Scotia (LAT 43°20'N, LONG 65°35'W) you wish to sail the shortest route to La Coruna, Spain (LAT 43°20'N, LONG 8°24'W). Which of the following will require you to plot a composite sailing? (Use gnomonic tracking chart WOXZC 5274)Not learned 533. On which voyage would a great circle track provide a significant savings in distance to steam, when compared to a rhumb line track? (Use gnomonic tracking chart WOXZC 5270.)Not learned 534. On which voyage would a great circle track be significantly shorter than a rhumb line track? (Use gnomonic tracking chart WOXZC 5274)Not learned 535. You wish to make good a course of 230°T while turning for an engine speed of 12.5 knots. The set is 180°T, and the drift is 1.7 knots. What speed will you make good along the track line?Not learned 536. On 4 October your 1907 zone time DR position is LAT 25°15.0'S, LONG 105°44.0'E. At that time, you observe Deneb bearing 011.5°psc. The chronometer reads 00h 07m 42s, and the chronometer error is 00m 36s fast. The variation is 7.5°W. What is the deviation of the standard compass?Not learned