Q183 - Navigation General: Oceans, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?Not learned 2. On 6 July, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time?Not learned 3. When adjusting a magnetic compass for error, which is TRUE concerning the deviation table?Not learned 4. Which aid is NOT marked on a chart with a magenta circle?Not learned 5. When is an air mass termed "warm"?Not learned 6. You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six hours. What is the safest action?Not learned 7. What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 42 feet (12.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".Not learned 8. What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS". (use charted range of 20 miles as nominal range)Not learned 9. Which term is given to the arc of an hour circle between the celestial equator and a point on the celestial sphere, measured northward or southward through 90°?Not learned 10. The ARPA may swap targets when automatically tracking if two targets are in which situation?Not learned 11. Your ARPA has been tracking a target and has generated the targets course and speed. The radar did not receive a target echo on its last two scans due to the weather. What should you expect under these circumstances?Not learned 12. 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 13. Which are associated with Cumulonimbus clouds?Not learned 14. What is the average speed of movement of a hurricane prior to recurvature?Not learned 15. To avoid error, how should you read the scale of an aneroid barometer?Not learned 16. What benefit is a weather bulletin to a mariner?Not learned 17. Which best defines current?Not learned 18. A body can only be observed at lower transit when __________.Not learned 19. Buoys which mark dredging areas are painted which color?Not learned 20. How are buoys which mark isolated dangers painted?Not learned 21. Which causes the Earth's irregular heating?Not learned 22. What causes the error of collimation with regards to the four adjustments to a sextant?Not learned 23. What can cause a tsunami?Not learned 24. What is a characteristic of cardinal marks?Not learned 25. Which characteristic and color will a preferred-channel buoy show?Not learned 26. What is the characteristic of a quick flashing light?Not learned 27. What is a characteristic of a rhumb line?Not learned 28. What do chart legends printed in capital letters indicate about the associated landmark?Not learned 29. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 30. When cold air displaces warm air, you have which type of front?Not learned 31. What color lights do lighted information markers display?Not learned 32. What are the colors of a mid-channel daymark?Not learned 33. Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?Not learned 34. Which condition(s) is(are) necessary for the formation of dew?Not learned 35. Which condition would most likely result in fog?Not learned 36. By convention, the Earth's south magnetic pole is which color?Not learned 37. When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.Not learned 38. Which corrector will compensate for the deviation which is maximum on intercardinal compass headings?Not learned 39. You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?Not learned 40. You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?Not learned 41. You are on course 344°T and take a relative bearing of a lighthouse of 090°. What is the true bearing to the lighthouse?Not learned 42. When does a current perpendicular to a vessel's track have the greatest effect on the vessel's course made good?Not learned 43. If the current and wind are in the same direction, what does the sea surface represent concern the true wind speed?Not learned 44. The most dangerous form of icing encountered at sea is formed by which of the following?Not learned 45. Which term is given to the database resulting from (1) the transformation of the electronic navigational chart (ENC) by ECDIS for appropriate use, (2) the updates to the ENC by appropriate means, and (3) the additional data added by the mariner?Not learned 46. When daylight savings time is kept, the times of tide and current calculations must be adjusted. How can this be accomplished?Not learned 47. Which daymark has no lateral significance?Not learned 48. Which defines the term relative humidity?Not learned 49. The vertical distance from the tidal datum to the level of the water is the __________.Not learned 50. It is desirable that a vessel encountering hurricane or typhoon conditions sends weather reports to the closest meteorological service at which time interval?Not learned 51. The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represented by __________.Not learned 52. What is the difference in local time between an observer on 114°W and one on 119°W?Not learned 53. Which is TRUE for the directive force acting on a gyrocompass?Not learned 54. What is the distance from the bottom of a wave trough to the top of a wave crest?Not learned 55. A Doppler speed log indicates speed through the water __________.Not learned 56. When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.Not learned 57. The dry-bulb temperature is 78°F (26°C) and the wet-bulb temperature is 68°F (20°C). What is the relative humidity?Not learned 58. ECDIS must give an alarm for which of the following cases?Not learned 59. An ECDIS is required to display which information?Not learned 60. ECDIS units incorporate Digital Chart Data that utilizes which formats?Not learned 61. You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 346°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?Not learned 62. You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer and running time at 13 knots to intercept vessel A?Not learned 63. 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 64. 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 65. You are entering an African port and see ahead of you a red can-shaped buoy. What action should you take?Not learned 66. The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian?Not learned 67. What can be expected with the presence of stratus clouds and a dying wind?Not learned 68. What does the expression "the air is saturated" mean?Not learned 69. Which is a feature of a special daymark?Not learned 70. You will find daily information about the duration of slack water in a port on the Atlantic Coast in which publication?Not learned 71. Fog forms when the air temperature is at or below __________.Not learned 72. Fog generally clears when the __________.Not learned 73. How can you follow the approach of a dangerous cyclonic storm?Not learned 74. Which of the following data layer categories is NOT displayed on ECDIS?Not learned 75. Which of the following describes the difference between true heading and magnetic heading?Not learned 76. Which of the following is the reference point to measure an azimuth angle for a body?Not learned 77. Which of the following is a standard correction applied to the reading of an aneroid barometer?Not learned 78. The four standard light colors used for lighted aids to navigation are red, green, white, and __________.Not learned 79. General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obtained from which publication?Not learned 80. In general, on how many radio channels will an automatic identification system (AIS) operate?Not learned 81. What is the geographic longitude of a body whose GHA is 215°15'?Not learned 82. At about GMT 1436, on 3 December, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 3°38.8'. What is the observed altitude?Not learned 83. Which term is given to the great circle of the celestial sphere that passes through the zenith, nadir, and the eastern point of the horizon?Not learned 84. A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?Not learned 85. A great circle will intersect the equator at how many degrees of longitude apart?Not learned 86. When is the greatest directive horizontal force exerted on the magnetic compass of a vessel?Not learned 87. 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 88. What is the gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction?Not learned 89. What happens to the intensity of a hurricane as it reaches higher latitudes and cooler waters?Not learned 90. The height of a light is measured from which reference plane?Not learned 91. In the horizon system of coordinates what is equivalent to the declination of the equator system?Not learned 92. In the horizon system of coordinates what is equivalent to the poles on the Earth?Not learned 93. Under the IALA-B Buoyage System, when entering from seaward, a buoy that should be left to port will be which color?Not learned 94. Under the IALA-B Buoyage System, which is TRUE of a conical buoy?Not learned 95. In the IALA Buoyage System, what do buoys with alternating red and green horizontal bands indicate?Not learned 96. Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.Not learned 97. Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?Not learned 98. Under the IALA Buoyage System, which topmark shown in illustration D023NG below will be displayed on a safe watermark?Not learned 99. Under the IALA Buoyage Systems, which is TRUE of safe water marks?Not learned 100. Illustration D011NG below represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE?Not learned 101. In illustration D039NG below, what type of cloud is indicated by the number one?Not learned 102. In illustration D051NG below, why was the position labeled "E" plotted?Not learned 103. You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown in illustration D047NG below. The range continues to open. What action should you take?Not learned 104. You are inbound in a channel marked by a range. The range line is 216°T. You are steering 213°T and have the range in sight as shown in illustration D048NG below. Which action should you take?Not learned 105. What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?Not learned 106. By what means are indications of the master gyrocompass sent to remote repeaters?Not learned 107. What information is NOT found in the chart title?Not learned 108. Which of the sources contains information on Northern Right Whales?Not learned 109. Information about the pilotage available at Miami harbor may best be obtained from which publication?Not learned 110. Where can information for updating paper nautical charts primarily be found?Not learned 111. How are you informed of defects or changes in aids to navigation?Not learned 112. The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course?Not learned 113. What is used to measure wind velocity?Not learned 114. At which interval should a traditional spring driven marine chronometer be rewound?Not learned 115. A latitude line will be obtained by observing a body __________.Not learned 116. Which level of accuracy can be obtained utilizing the U.S. Coast Guard's Maritime Differential GPS in an established coverage area?Not learned 117. Which light characteristic may be used on a special mark?Not learned 118. Which light characteristic may be used on a special purpose mark?Not learned 119. 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 120. The Light List indicates that a dayboard is a type KGW. You should take which action?Not learned 121. The Light List indicates that a dayboard is a type TR-SY. Which action should you take?Not learned 122. The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 30 feet (9.1 meters) and the visibility is 0.5 mile. At what approximate range will you first sight the light?Not learned 123. What is the light phase characteristic of a lighted isolated-danger mark?Not learned 124. Which line connects the points of zero magnetic dip?Not learned 125. A line of position from a celestial observation is a segment of which choice?Not learned 126. The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.Not learned 127. The line of position should be plotted as a circle around the GP of the body when the Ho exceeds what minimum value?Not learned 128. Which term is given to a line on a weather chart connecting places which have the same barometric pressure?Not learned 129. A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than which duration?Not learned 130. Local sidereal time is equal to the __________.Not learned 131. At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.Not learned 132. The magnitude of three stars is indicated. Which star is the brightest?Not learned 133. What is the major problem with taking high altitude sun observations?Not learned 134. How many fixed objects are needed to plot a running fix?Not learned 135. A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has which error?Not learned 136. Which maritime radio system, consisting of a series of coast stations, transmits coastal warnings?Not learned 137. Mean lower low water is the reference plane used for which measurements?Not learned 138. The measurement of local time is based on the passage of the Sun over the __________.Not learned 139. Which term is given to the mechanical lifting of air by the upslope slant of the terrain?Not learned 140. Which meteorological feature controls the climate of the Gulf of Mexico and the coastal area during late spring and summer?Not learned 141. A mid-channel buoy, may show which light?Not learned 142. In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT one of these factors?Not learned 143. When the moon is at first quarter or third quarter phase, what type of tides will occur?Not learned 144. When the moon is new or full, which type of tides occur?Not learned 145. At morning stars, the last stars that should be observed are those with an azimuth in which quadrant?Not learned 146. Which name is given to the pressure-sensitive element of an aneroid barometer?Not learned 147. Which navigational mark may only be lettered?Not learned 148. When do neap tides occur?Not learned 149. Which is a nonadjustable error of the sextant?Not learned 150. In North America, which direction do the majority of the weather systems move?Not learned 151. In the Northern Hemisphere, when the center of a high-pressure system is due east of your position, you can expect winds from which direction?Not learned 152. You are in the Northern Hemisphere and a tropical wave is located 200 miles due east of your position. Where will the wave be located 12 hours later?Not learned 153. 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 154. How can Northern right whales can be identified?Not learned 155. What do the numbers on isobars indicate?Not learned 156. What does the numeral in the center of a wind rose circle on a pilot chart indicate?Not learned 157. If you observe a rapid fall of barometric pressure, which action should you take?Not learned 158. If an observer in the Northern Hemisphere faces the surface wind, where is the center of low pressure located?Not learned 159. How is an occluded front represented on a weather map?Not learned 160. 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 161. How often are the time signals broadcast by WWV and WWVH transmitted?Not learned 162. An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?Not learned 163. When is the peak of the hurricane season in the western North Pacific?Not learned 164. A pilot chart does NOT contain information about which item?Not learned 165. You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?Not learned 166. You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?Not learned 167. What does the prefix "nimbo" in a cloud's name mean?Not learned 168. Your present weather is sunny with a steady barometer. A low swell approaches your vessel from the south with crests passing at relatively long periods of about four per minute. What does this usually indicate?Not learned 169. What is the primary source of the earth's weather?Not learned 170. The principal vertical circle is that great circle on the celestial sphere that passes through which of the following?Not learned 171. Prior to reading an aneroid barometer, why should you tap the face lightly with your finger?Not learned 172. While proceeding along the Mediterranean coast of Spain, you sight the black and yellow buoy shown in illustration D020NG below. Your course is 039°T, and the buoy bears 053°T. What action should you take?Not learned 173. 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 174. What is published by the U.S. Coast Guard?Not learned 175. Which radar control reduces weak echoes out to a limited distance from the ship?Not learned 176. Which radar control shortens all echoes on the display and reduces clutter caused by rain or snow?Not learned 177. What is the reaction of a gyrocompass to an applied force known as?Not learned 178. What do red sectors of navigation lights warn mariners of?Not learned 179. IN REGION A of the IALA Buoyage System, when entering from seaward, how would the starboard side of a channel be marked?Not learned 180. What is the relative bearing of an object on the port beam?Not learned 181. 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 182. With respect to a reversing current, when does slack water occur?Not learned 183. What results when warm moist air blows over a colder surface and is cooled below its dew point?Not learned 184. 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 185. Safe water buoys may show ONLY which type of light?Not learned 186. If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?Not learned 187. In shallow water, waves that are too steep to be stable, causing the crests to move forward faster than the rest of the wave. This occurrence describes which term?Not learned 188. A sidereal day is approximately how much shorter than a solar day?Not learned 189. You sight a buoy fitted with a double-sphere topmark. If sighted at night, what color and light sequence would you expect to see?Not learned 190. What is a sling psychrometer used to measure?Not learned 191. What does a slow rise in the barometric pressure forecast?Not learned 192. In which source could you find the number of a chart for a certain geographic area?Not learned 193. In the Southern Hemisphere winds in a low pressure system rotate in which direction?Not learned 194. The speed of sound through ocean water is nearly always __________.Not learned 195. Which is TRUE concerning the occurrence of Spring tides?Not learned 196. How does the standard magnetic compass heading differ from the true heading?Not learned 197. Which statement concerning the chartlet seen in illustration D010NG below is TRUE? (Soundings and heights are in meters)Not learned 198. Which statement about gyrocompass error is TRUE?Not learned 199. Which statement is TRUE for an unlighted, red and green, horizontally-banded buoy with the topmost band red?Not learned 200. While steaming on course 280°T, you sight a buoy showing a very quick flashing (VQ) white light well to port. Maintaining course, you sight another buoy showing a quick flashing (Q) white light. How should you pass?Not learned 201. You are steaming west in the South Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, where does the center of low pressure lie?Not learned 202. While steaming north of the Irish coast, you sight a buoy which shows the light rhythm shown in illustration D028NG below. How would you pass this buoy?Not learned 203. You are steaming in the open ocean of the North Pacific between the Aleutian Chain and Hawaii. A warning broadcast indicates that an earthquake has occurred in the Aleutians and has generated a tsunami that is predicted to hit Hawaii. What action is necessary for the ship's safety?Not learned 204. You are steering a southerly course, and you note that the chart predicts an easterly current. Without considering wind, how may you allow for the set?Not learned 205. The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light?Not learned 206. You take a bearing of 086° of a lighthouse. Which bearing of another object would give the best fix?Not learned 207. Which is TRUE as the temperature of the air reaches the dew point?Not learned 208. Temperature and moisture characteristics are modified in a warm or cold air mass due to which factor?Not learned 209. Which is the term given to the time required for a lighted aid to complete a full cycle of light changes?Not learned 210. Which term is given to the vertical angle between the horizontal and the magnetic line of force?Not learned 211. Which term refers to the direction a current is flowing?Not learned 212. Which term is used to describe a generally circular low-pressure area?Not learned 213. Which term is used to describe the time interval between successive wave crests?Not learned 214. Which term is used to describe the wind speed and direction observed from a moving vessel?Not learned 215. Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?Not learned 216. Which topmark shown in illustration D023NG below identifies an isolated danger?Not learned 217. On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned to voluntary Naval Cooperation and Guidance for Shipping (NCAGS). Where can further information be located?Not learned 218. In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is located in which position?Not learned 219. Tropical storms and hurricanes are most likely to form in the Southern hemisphere during which months?Not learned 220. Which is TRUE if the compass error of a magnetic compass has no deviation?Not learned 221. Which is TRUE concerning air masses near the earth's surface?Not learned 222. Which is TRUE concerning the magnetic information on a chart?Not learned 223. Which is TRUE concerning the points on the earth's surface where the magnetic dip is 90°?Not learned 224. Which is TRUE concerning Spring tides?Not learned 225. Which is TRUE concerning weather information?Not learned 226. Which is TRUE concerning Wind velocity?Not learned 227. Which is TRUE of the direction of flow (channel) on the Corps of Engineer's Navigation Maps?Not learned 228. Which is TRUE of echo-sounders?Not learned 229. Which is TRUE for a sextant having an index error that is "on the arc"?Not learned 230. Which type of cloud is among the most dependable for giving an indication of an approaching weather system?Not learned 231. What type of clouds are associated with a cold front?Not learned 232. Which type of cloud is hail most likely to fall from?Not learned 233. Under the U.S. Aids to Navigation System, a special mark possesses which of the following characteristics?Not learned 234. You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?Not learned 235. You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 120°T, 100 miles from your position. The hurricane is moving towards 265°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?Not learned 236. You are underway on course 328°T when you sight a buoy broad on your port bow. Which would indicate that you are in the best navigable water?Not learned 237. While underway vessels equipped with an automatic identification system (AIS) are required to transmit specific information at varying intervals. What information contained in a class A unit broadcast is only required to be transmitted every six minutes?Not learned 238. It is unlawful to approach within how many yards of a Northern Right Whale?Not learned 239. When using GPS without Selective Availability, what can you expect your horizontal accuracy to be of the unit?Not learned 240. When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?Not learned 241. When using a mechanical (windup type) marine chronometer, how often should it be reset?Not learned 242. When using a radar in an unstabilized mode, fixes are determined most easily from __________.Not learned 243. The velocity of the wind, its steady direction, and the amount of time it has blown determines what about a wind driven current?Not learned 244. The vertex of a great circle track is in LONG 109°E. Which longitude would an eastbound vessel cross the equator?Not learned 245. Your vessel is located at position I on the weather map in illustration D013NG below. You should experience which weather condition?Not learned 246. Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buoy on the starboard bow. Which action should you take?Not learned 247. 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 248. What weather change accompanies the passage of a cold front in the Northern Hemisphere?Not learned 249. A weather forecast states that the wind will commence veering. In the Northern Hemisphere, what changes will occur?Not learned 250. Weather information provided by the National Weather Service (NWS) advisories should be used along with which other source of information?Not learned 251. Weather observations provided by each weather station include all of the following except which item?Not learned 252. In a weather report, which defines the term "visibility"?Not learned 253. What does a white buoy with a blue band signify?Not learned 254. What does a white buoy with an open-faced orange diamond on it indicate?Not learned 255. What does a white buoy with an orange circle marked on it indicate?Not learned 256. Where would you expect to find channels marked with the IALA-A Buoyage System?Not learned 257. Where would you expect to find climatological and meteorological tables for the Gulf Coast area?Not learned 258. Yellow lights may appear on which buoys?Not learned 259. 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 260. 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 261. Yesterday your chronometer read 11h 59m 59s at the 1200 GMT time tick. Today the chronometer reads 11h 59m 57s at the 1200 time tick. What is the chronometer rate?Not learned 262. 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 263. The zenith is the point on the celestial sphere that is __________.Not learned 264. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 265. How is an occluded front represented on a weather map?Not learned 266. The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 40 feet (12.2 meters). Your height of eye is 25 feet (7.6 meters) and the visibility is 5 miles. At about what range will you FIRST sight the light?Not learned 267. Geographic range is the maximum distance at which a light may be seen under which conditions?Not learned 268. The Light List indicates that a light has a nominal range of 14 miles and is 42 feet (12.7 m) high. If the visibility is 16 miles and your height of eye is 20 feet (6.1 m), at which approximate distance will you sight the light?Not learned