Q203 - Navigation General: Near Coastal, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. According to Buys Ballot's Law, when an observer in the Southern Hemisphere experiences a northwest wind, where is the center of the low pressure located?Not learned 2. How can the accuracy of an azimuth circle be checked?Not learned 3. What will act to dissipate fog?Not learned 4. Which action is the safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone?Not learned 5. Which aid is NOT marked on a chart with a magenta circle?Not learned 6. An air mass that has moved down from Canada would most likely have which symbols?Not learned 7. Which is TRUE of an alternating light?Not learned 8. Which is a characteristic of anticyclones?Not learned 9. The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?Not learned 10. The approximate distance to a storm center can be determined by noting the hourly rate of fall of the barometer. If the rate of fall is 0.08 - 0.12 inches, what is the approximate distance to the storm center?Not learned 11. Ascending and descending air masses with different temperatures is part of an important heat transmitting process in our atmosphere. Which term is given to this process?Not learned 12. Which term describes the atmosphere in the vicinity of a high pressure area?Not learned 13. Atmospheric pressure may be measured with which instrument?Not learned 14. The average height of the surface of the sea for all stages of the tide over a 19 year period is known by which term?Not learned 15. What is the average speed of the movement of a hurricane following the recurvature of its track?Not learned 16. Barometers are calibrated at which standard temperature?Not learned 17. The Benguela Current flows in which direction?Not learned 18. The Brazil Current flows in which general direction?Not learned 19. Which of the buoys listed below could be used to mark an anchorage?Not learned 20. Buoys which mark dredging areas are painted which color?Not learned 21. Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?Not learned 22. When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be found?Not learned 23. When changing from a compass course to a true course, which should you apply?Not learned 24. Which would be the characteristic of an occulting light?Not learned 25. Which is a characteristic of warm air masses?Not learned 26. The chart of a beach area shows a very steep slope to the underwater beach bottom. Which type of breakers can be expected when trying to land a boat on this beach?Not learned 27. If a chart indicates the depth of water to be 6 fathoms and your draft is 6.0 feet, what is the depth of the water under your keel? (Assume the actual depth and charted depth to be the same)Not learned 28. Your chart indicates that there is an isolated rock and names the rock using vertical letters. What does this indicate?Not learned 29. The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?Not learned 30. Chart information details to be used in ECDIS should be the latest edition of information originated by a government-authorized hydrographic office and conform to the standards of which organization?Not learned 31. What do chart legends printed in capital letters indicate about the associated landmark?Not learned 32. On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well-defined edges and rain is falling from the dark lower edge. What should you expect if this cloud passes directly overhead?Not learned 33. The climate of the northern coast of the Gulf of Mexico is _________.Not learned 34. Which clouds are described as high clouds, composed of small white flakes or scaly globular masses, and often banded together to form a "mackerel sky"?Not learned 35. Which cloud is described as a low, dark, sheet-like cloud which is associated with continuous precipitation for many hours?Not learned 36. When would cloud formations be minimal?Not learned 37. What color is a triangular daymark?Not learned 38. Which is most commonly associated with fog?Not learned 39. Which of the following compensates for errors introduced when a vessel heels over?Not learned 40. Which conditions should a vessel entering the eye of a hurricane expect?Not learned 41. When considering currents, which defines the term set?Not learned 42. By convention, the Earth's south magnetic pole is which color?Not learned 43. By convention, the north pole of a magnet is painted which color?Not learned 44. Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line rather than as individual targets. What causes this distortion?Not learned 45. Which correction must be applied to an aneroid barometer reading?Not learned 46. While on a course of 019°pgc, a light bears 14° on the port bow at a distance of 15.3 miles. What course should you steer to pass 1.5 miles abeam of the light, leaving it to port?Not learned 47. You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?Not learned 48. You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?Not learned 49. You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?Not learned 50. You are on course 222°T and take a relative bearing of a lighthouse of 025°. What is the true bearing to the lighthouse?Not learned 51. You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?Not learned 52. Which of the following should be done when crossing the magnetic equator?Not learned 53. When does a current perpendicular to a vessel's track have the greatest effect on the vessel's course made good?Not learned 54. Which current is responsible for the movement of large quantities of ice into the North Atlantic shipping lanes?Not learned 55. If the current and wind are in the same direction, what does the sea surface represent concern the true wind speed?Not learned 56. If the current and wind are in opposite directions, what does the sea surface indicate?Not learned 57. The most dangerous form of icing encountered at sea is formed by which of the following?Not learned 58. Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?Not learned 59. Where can information about the direction and velocity of rotary tidal currents be found?Not learned 60. Which term is used to describe the database information that should be shown when a chart is first displayed on ECDIS?Not learned 61. The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is __________.Not learned 62. Which daymark has no lateral significance?Not learned 63. A daymark used as a special mark is indicated by which letter in illustration D045NG below?Not learned 64. Which is TRUE of a dead reckoning (DR) plot?Not learned 65. The range of tide is the __________.Not learned 66. Which defines the term relative humidity?Not learned 67. The depth of water on a chart is indicated as 23 meters. What does that depth convert to?Not learned 68. Which describes a light having characteristics which include color variations?Not learned 69. Which describes the visible range marked on charts for lights?Not learned 70. 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 71. Which is the difference between the DR position and a fix, both of which have the same time?Not learned 72. The direction in which a vessel is steered is the course. The path actually followed is the __________.Not learned 73. The direction in which a vessel should be steered between two points is known by which term?Not learned 74. Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, which is TRUE of the current?Not learned 75. How are the doldrums characterized?Not learned 76. When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.Not learned 77. The dry bulb temperature is 78°F and the wet bulb temperature is 62°F. What is the relative humidity?Not learned 78. The ECDIS must have the capability to preserve the record of the voyage track. How many hours of the previous track are required to be maintained?Not learned 79. The edge of a hurricane has overtaken your MODU in the Gulf of Mexico and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________.Not learned 80. When does the effects of priming of the tides occur?Not learned 81. An electronic depth finder operates on which principle?Not learned 82. You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T at 68 miles from you. What is the course to steer and running time at 13 knots to intercept vessel A?Not learned 83. You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T, 68 miles from you. What is the time to intercept if you make 13 knots?Not learned 84. You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T at 43 miles from you. What is the course to steer and running time at 16 knots to intercept vessel A?Not learned 85. You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T, 43 miles from you. What is the time to intercept if you make 16 knots?Not learned 86. You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042°T, 105 miles from you. What is the time to intercept if you make 10 knots?Not learned 87. You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. What does it indicate if the wind veers steadily?Not learned 88. You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown in illustration D047NG below, on your starboard beam. What action should you take?Not learned 89. What can be expected with the presence of stratus clouds and a dying wind?Not learned 90. What does the expression "the air is saturated" mean?Not learned 91. What feature(s) of a daymark is (are) used to identify the beacon upon which it is mounted?Not learned 92. Which feature, when set to zero, might allow a GPS unit to have an accuracy equivalent to Precise Positioning Service receiver capability?Not learned 93. Which is a feature of a special daymark?Not learned 94. You will find daily information about the duration of slack water in a port on the Atlantic Coast in which publication?Not learned 95. Fog forms when which condition exists?Not learned 96. How can you follow the approach of a dangerous cyclonic storm?Not learned 97. Which item is NOT associated with cumulonimbus clouds?Not learned 98. Which of the following causes the development of an occluded front?Not learned 99. Which of the following describes gyrocompass repeaters which reproduce the indications of the master gyrocompass?Not learned 100. All of the following can be found on a Pilot Chart EXCEPT information concerning which item?Not learned 101. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 102. Of the four light characteristics shown in illustration D019NG below which one does NOT represent a safe water mark of the IALA Buoyage System?Not learned 103. The four standard light colors used for lighted aids to navigation are red, green, white, and __________.Not learned 104. Which frontal system occurs when a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass?Not learned 105. The greater the pressure difference between a high and a low-pressure center, the __________.Not learned 106. A green buoy has a yellow triangle on it. What type of buoy is this?Not learned 107. If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings?Not learned 108. You are heading in a northerly direction when you come across an easterly current. Your vessel will respond in which manner?Not learned 109. The height of a light is measured from which reference plane?Not learned 110. Which is TRUE when a high pressure system is centered north of your vessel in the Northern Hemisphere?Not learned 111. What does a hygrometer measure?Not learned 112. Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?Not learned 113. In illustration D045NG below, which shape is a daymark warning of danger?Not learned 114. In illustration D051NG below, why was the position labeled "E" plotted?Not learned 115. An important lunar cycle affecting the tidal cycle is called the nodal period. How long is this cycle?Not learned 116. What indicates the arrival of a hurricane within 24 to 36 hours?Not learned 117. By what means are indications of the master gyrocompass sent to remote repeaters?Not learned 118. An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of the following is NOT a characteristic of indirect echoes?Not learned 119. Which item contains information about temporary, short-term changes affecting the safety of navigation in U.S. waters?Not learned 120. You have been informed that dredging operations may be underway in your vicinity. Which buoy indicates the dredging area?Not learned 121. Which item in illustration D034NG below shows a MorseNot learned 122. The largest waves (heaviest chop) will usually develop where the wind blows __________.Not learned 123. The left half of the storm is called the navigable semicircle because __________.Not learned 124. A very light breeze that causes ripples on a small area of still water is a known by which term?Not learned 125. Which term describes a light, feathery deposit of ice by sublimation of water vapor directly into the crystalline form on objects whose temperatures are below freezing?Not learned 126. Lighted white and orange buoys must show which color light?Not learned 127. A line of position from a celestial observation is a segment of which choice?Not learned 128. Which of the listed properties does warm air possess?Not learned 129. Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. Which are the correctors?Not learned 130. At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.Not learned 131. What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?Not learned 132. To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at which time in relation to the predicted time of the favorable current?Not learned 133. Mariners are FIRST warned of serious defects or important changes to aids to navigation by which means?Not learned 134. What is the reference datum mean high water used to measure?Not learned 135. Which measurement uses mean high water as the reference plane?Not learned 136. If your mercurial barometer reads 30.50 inches (1033 millibars) and the temperature is 56°F (13°C), what is the correct reading at 55°N, 150°W?Not learned 137. Which meteorological feature controls the climate of the Gulf of Mexico and the coastal area during late spring and summer?Not learned 138. In which months will the North Equatorial Countercurrent be strongest?Not learned 139. Which name is given to the pressure-sensitive element of an aneroid barometer?Not learned 140. What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?Not learned 141. A NAVAREA warning carries the following number: 1986/87 (11). Which statement is TRUE?Not learned 142. While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 1/2 seconds after the signal was sounded. What is the distance to the shore?Not learned 143. When navigating in high latitudes and using a chart based on a Lambert conformal projection, which is TRUE?Not learned 144. Which navigational mark may only be lettered?Not learned 145. When do neap tides occur?Not learned 146. In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing white light. Which of the four topmarks shown in illustration D031NG below will this buoy be fitted with under the IALA Buoyage system?Not learned 147. In the Northern Hemisphere you are caught in the dangerous semicircle of a storm with plenty of sea room available. Which is the best course of action to take?Not learned 148. In the Northern Hemisphere, swells that have outrun the storm are produced in which location?Not learned 149. You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wave be located 24 hours later?Not learned 150. In the Northern Hemisphere, if your vessel is in a hurricane's navigable semicircle where should you position the wind relative to the vessel?Not learned 151. How can Northern right whales can be identified?Not learned 152. If you observe a rapid fall of barometric pressure, which action should you take?Not learned 153. When observing a rapid rise in barometric pressure, what may you expect?Not learned 154. Which is TRUE of an occulting light?Not learned 155. What occurs when rising air cools to the dew point?Not learned 156. Which term defines the ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth?Not learned 157. Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?Not learned 158. On what does the operation of an aneroid barometer depend?Not learned 159. You are outbound in a channel marked by a range astern. The range line is 309°T. You are steering 127°T and have the range in sight as shown in illustration D047NG below. What action should you take?Not learned 160. A pilot chart does NOT contain information about which item?Not learned 161. Plain language is usually used on marine weather __________.Not learned 162. You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?Not learned 163. While proceeding along the Norwegian coast on course 039°T, you sight the black-yellow-black banded buoy shown in illustration D021NG below, bearing 053°T. What action should you take?Not learned 164. You are proceeding up a channel at night. It is marked by a range which bears 185°T. You steady up on a compass course of 180° with the range in line dead ahead. This indicates that you(r) __________.Not learned 165. Which publication indicates the HYDROLANTS or HYDROPACS issued since the previous working day?Not learned 166. Which publication lists Class I and II private aids to navigation in or along navigable waters of the United States?Not learned 167. Which radar control shortens all echoes on the display and reduces clutter caused by rain or snow?Not learned 168. Which term is given to a radar display which is oriented, so that north is always at the top of the screen?Not learned 169. Your radar indicates a target; however, there is no visible object at the point indicated. A large mountain, approximately 50 miles away on the same bearing as the target, is breaking the horizon. You should suspect the radar target is caused by __________.Not learned 170. Which is TRUE of Radiation fog?Not learned 171. Which is TRUE of Raster-scan chart data?Not learned 172. When recording the wind direction in the weather log, which information would you report?Not learned 173. Which is the region containing 3/4 of the mass of the atmosphere and to which are confined such phenomena as clouds, storms, precipitation and changing weather conditions?Not learned 174. In regions near the poles, how are the winds generally described?Not learned 175. Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at __________.Not learned 176. You have replaced the chart paper in the course recorder. Which statement is TRUE?Not learned 177. A rotary current sets through all directions of the compass. How much time does it take to complete one of these cycles, in a locale off the East coast of the U.S.?Not learned 178. You are running parallel to the coast and take a running fix using bearings of the same object. Which is TRUE if you are making less speed than used for the running fix, in relation to the position indicated by the fix?Not learned 179. How is a safe water mark, that can be passed close aboard on either side, painted and lighted?Not learned 180. If you were sailing in the North Pacific and were interested in the ice and iceberg limits, where could you find this information?Not learned 181. You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which statement is TRUE?Not learned 182. Which scale is used to estimate wind speed by observing sea conditions?Not learned 183. Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.Not learned 184. If a ship is proceeding towards the magnetic equator, which is TRUE concerning the uncorrected deviation due to permanent magnetism?Not learned 185. What does the shoreline on charts generally represent?Not learned 186. You sight a spar buoy with the topmark shown in illustration D027NG below. You must take which of the following actions?Not learned 187. What does a single barometric pressure reading of 28.60 indicate?Not learned 188. What does a slow rise in the barometric pressure forecast?Not learned 189. Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or which other color?Not learned 190. If a sound signal is emitted from the oscillator of a fathometer, and two seconds elapse before the returning signal is picked up, what depth of water is indicated?Not learned 191. As the South Equatorial Current approaches the east coast of Africa, it divides with the main part flowing south to form which current?Not learned 192. A special mark (yellow buoy), if lighted, may exhibit which light rhythm?Not learned 193. Which term is used to describe the speed at which an ocean wave system advances?Not learned 194. Spring tides occur __________.Not learned 195. "Stand" of the tide is that time when __________.Not learned 196. What is the standard atmospheric pressure in millibars?Not learned 197. A star is observed at lower transit. Which is TRUE concerning the line of position derived from this sight?Not learned 198. Which statement concerning the chartlet seen in illustration D010NG below is TRUE? (Soundings and heights are in meters)Not learned 199. Which statement about a gnomonic chart is correct?Not learned 200. Which statement about gyrocompass error is TRUE?Not learned 201. Which statement about radio navigational warnings is TRUE?Not learned 202. Which statement is TRUE concerning the current of the Gulf Stream?Not learned 203. Which statement is TRUE concerning a Mercator projection?Not learned 204. Steam fog will occur when which conditions exists?Not learned 205. You are steaming on a course of 246°T at 17 knots. At 2107 you observe a lighthouse bearing 207°T. At 2119 the lighthouse bears 179°T. What is your distance off at the second bearing?Not learned 206. You are steaming southward along the west coast of the United States when you sight a buoy showing a flashing green light. How should you pass this buoy?Not learned 207. What does a steep barometric gradient indicate?Not learned 208. You are steering 143°T, and a light is picked up dead ahead at a distance of 18.2 miles at 2006. You change course to pass the light 5.5 miles off abeam to port. If you are making 14.5 knots, what is your ETA at a position 5.5 miles off the light?Not learned 209. You are steering 318°psc. A northeasterly wind causes 3° of leeway. The variation is 14°E and the deviation table is extracted below. What will be the true course made good? DEVIATION TABLE Magnetic Heading Deviation 300° 2°E 315° 0 330° 2°WNot learned 210. While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?Not learned 211. While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?Not learned 212. All straight lines represent great circle tracks on a chart based on which projection?Not learned 213. You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a gyro heading of 039°. PSC PGC 030.5° 024° 061.5° 054° 092.0° 084° 122.5° 114° 152.0° 144° 181.0° 174° 210.0° 204° 239.5° 234° 269.0° 264° 298.0° 294° 327.5° 324° 358.5° 354°Not learned 214. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 166°. PSC PGC 030.5° 024° 061.5° 054° 092.0° 084° 122.5° 114° 152.0° 144° 181.0° 174° 239.5° 234° 269.0° 264° 210.0° 204° 298.0° 294° 327.5° 324° 358.5° 354°Not learned 215. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 057°. Deviation table NP-0109Not learned 216. A sylphon cell is a part of which instrument?Not learned 217. The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic does the light possess?Not learned 218. Which symbol represents a 2-fathom curve?Not learned 219. What is a system of reservoirs and connecting tubes in a gyro compass called?Not learned 220. You take a bearing of 086° of a lighthouse. What bearing of another object would give the best fix?Not learned 221. You take a bearing of 264° of a lighthouse. Which bearing of another object would give the best fix?Not learned 222. You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?Not learned 223. Which term is given to the dense black cumulonimbus clouds surrounding the eye of a hurricane?Not learned 224. Which is the term given to the time required for a lighted aid to complete a full cycle of light changes?Not learned 225. Which term is given to a tornado that moves out over the water from land?Not learned 226. Which term is used to describe a generally circular low-pressure area?Not learned 227. Which term is used to describe the small differences between the heights of two successive high tides or two low tides, in a tidal day?Not learned 228. Which is TRUE of the tides in Boston Harbor?Not learned 229. The time meridian that is used when computing the currents for Pensacola Bay, Florida, is __________.Not learned 230. Tropical cyclones normally form within which of the following belts of latitude?Not learned 231. Which is TRUE concerning the speed of sound in water?Not learned 232. Which is TRUE concerning Spring tides?Not learned 233. Which is TRUE concerning weather information?Not learned 234. 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 235. The true course between two points is 057°. Your gyrocompass has an error of 3° east and you make an allowance of 1° leeway for a north-northwest wind. Which gyro course should be steered to make the true course good?Not learned 236. Which is TRUE of the dangerous semicircle of a hurricane in the Northern Hemisphere?Not learned 237. Which is TRUE of the horse latitudes?Not learned 238. Which is TRUE why Tropical cyclones do not form within 5° of the Equator?Not learned 239. Which is TRUE when using the radar for navigation?Not learned 240. Two navigational hazards are located near to each other, but each is marked by an individual cardinal buoyage system. How are the buoys of one cardinal system identified from the other system?Not learned 241. Which type of cloud is hail most likely to fall from?Not learned 242. The type of current which will have the greatest effect on the course made good for your vessel is __________.Not learned 243. Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level?Not learned 244. Which type of precipitation is a product of the violent convection in thunderstorms?Not learned 245. Under the U.S. Aids to Navigation System, which category is a yellow buoy?Not learned 246. You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________.Not learned 247. You are underway on course 106°T at a speed of 15.3 knots. You sight a buoy bearing 109°T at a radar range of 3.6 miles at 1725. If you change course at 1728, what is the course to steer to leave the buoy abeam to port at 0.5 mile?Not learned 248. You are underway on course 120°T and can make 12 knots. The eye of a hurricane bears 150°T at 120 miles. The hurricane is on course 295° at 20 knots. What course should you steer at 12 knots to have the maximum CPA?Not learned 249. You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. What does this indicate?Not learned 250. In the United States, who broadcasts the short-range radio navigational warnings?Not learned 251. When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?Not learned 252. When using a radar in an unstabilized mode, fixes are determined most easily from __________.Not learned 253. When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that may not be from the actual ocean bottom?Not learned 254. The velocity of a rotary tidal current will be decreased when the Moon is at which phase?Not learned 255. Your vessel has changed course and is heading 285°T, you are on the charted range and it appears as in illustration D048NG below. After several minutes the range appears as in illustration D047NG below and your heading is still 285°T. What does this indicate?Not learned 256. Your vessel is on a course of 082°T at 19 knots. At 0255 a light bears 059.5°T, and at 0312 the light bears 037°T. At what time and distance off will your vessel be when abeam of the light?Not learned 257. Your vessel is on course 093°T at 15 knots. At 1835 a light bears 136°T, and at 1857 the same light bears 170°T. What was your distance off the light at 1857?Not learned 258. Your vessel is located at position I on the weather map in illustration D013NG below. You should experience which weather condition?Not learned 259. Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing?Not learned 260. Your vessel is participating in the Voluntary Observing Ship Program, at 1200 ZT on 31 August, your position is LAT 43°14'S, LONG 175°44'E. You are preparing WS Form B-80 as seen in illustration D041NG below. How should you encode the first three groups after the call sign if you estimate the wind?Not learned 261. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. The dry bulb thermometer reads 54°F and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report?Not learned 262. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. The dry bulb thermometer reads 78°F and the wet bulb thermometer reads 75°F. How would you encode the air temperature groups in the report?Not learned 263. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. You are hove to in a hurricane on a heading of 328°T. The wind is from 030° true at 119 knots. How should this be encoded on the weather report form?Not learned 264. Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 283°T, and the variation is 13°E. If the heading of your vessel at the time of the sighting is 278° per standard compass, what is the deviation?Not learned 265. Your vessel is steering course 352°psc, variation for the area is 11°E, and deviation is 9°W. The wind is from the northeast, producing a 1° leeway. What true course are you making good?Not learned 266. When your vessel is on the storm track but behind the storm's center the __________.Not learned 267. Your vessel is underway on a course of 323.5°T at a speed of 16 knots. At 1945 a light bears 350°T. At 2010 the light bears 008.5°T. What will be your distance off when abeam of the light?Not learned 268. On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will __________.Not learned 269. When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.Not learned 270. What weather change accompanies the passage of a cold front in the Northern Hemisphere?Not learned 271. Which weather element cannot be measured accurately while on board a moving vessel?Not learned 272. Weather patterns in the Gulf of Mexico area of the United States are _____.Not learned 273. In a weather report, which defines the term "visibility"?Not learned 274. Where is the West Wind Drift located?Not learned 275. What does a white buoy with an orange cross within a diamond marked on it indicate?Not learned 276. What do widely spaced isobars on a weather map indicate?Not learned 277. The winds of the "roaring forties" are strongest near which latitude?Not learned 278. Why is the wind velocity higher in the dangerous semicircle of a tropical cyclone?Not learned 279. You wish to check the deviation of your standard magnetic compass. You find a natural range that you steer for and note that the gyrocompass heading is 034°, and the heading by standard magnetic compass is 026°. The gyro error is 1°W. Variation is 9°E. What is the deviation for that heading?Not learned 280. You wish to make good a course of 035°T while turning for an engine speed of 12 knots. The set is 340°T, and the drift is 2 knots. What speed will you make good along the track line?Not learned 281. You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, where should you set the points of the dividers to obtain the most accurate measurement?Not learned 282. Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1500 GMT time tick. What is the chronometer error?Not learned 283. Yesterday your chronometer read 11h 59m 58s at the 1200 GMT time tick. Today your chronometer reads 12h 00m 00s at the 1200 time tick. What is the chronometer rate?Not learned 284. Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the chronometer error?Not learned 285. 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 286. You desire to make good a true course of 174°. The variation is 17°W, magnetic compass deviation is 4°W, and gyrocompass error is 4°E. A west-southwest wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?Not learned 287. You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2° W. The variation is 8° W. Find the deviation on a magnetic compass heading of 210°. PSC PGC 030.5° 024° 061.5° 054° 092.0° 084° 122.5° 114° 152.0° 144° 181.0° 174° 210.0° 204° 239.5° 234° 269.0° 264° 298.0° 294° 327.5° 324° 358.5° 354°Not learned 288. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a gyro heading of 058°.Not learned 289. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a true heading of 319°.Not learned 290. You are underway and intend to make good a course of 350°T. You experience a current with a set and drift of 070°T at 1.5 knots, and a westerly wind produces a leeway of 4°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 10 knots. What will be your speed made good over your intended course of 350°T?Not learned 291. Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 311°T, and the variation is 8°E. If the heading of your vessel at the time of the sighting is 305° per standard magnetic compass, what is the correct deviation?Not learned 292. Your vessel is proceeding down a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 229°T, and variation is 6°W. If the heading of your vessel at the time of the sighting is 232° per standard magnetic compass, what is the deviation?Not learned 293. Your vessel is steering course 243°psc. Variation for the area is 5°E, and deviation is 2°W. The wind is from the south-southeast, producing a 2° leeway. What true course are you making good?Not learned 294. Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest water is on which side of the mark?Not learned 295. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 234°.Not learned 296. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 004°. PSC PGC 030.5° 024° 061.5° 054° 092.0° 084° 122.5° 114° 152.0° 144° 181.0° 174° 239.5° 234° 269.0° 264° 210.0° 204° 298.0° 294° 327.5° 324° 358.5° 354°Not learned 297. Which symbol represents a 20-fathom curve?Not learned 298. The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?Not learned 299. Which type of current will have the greatest effect on the course made good for your vessel?Not learned 300. You will be transiting a traffic lane with a wreck having a charted depth of 40 feet. The Zone of Confidence (ZOC) for that area of the chart is ZOC B. Which of the following statements is trueNot learned 301. You are running parallel to the coast and plotting running fixes using bearings of the same object. You are making more speed than assumed for the running fix. In relation to the position indicated by the fix you will be __________.Not learned