Q413 - Navigation General: Oceans, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. How can the accuracy of an azimuth circle be checked?Not learned 2. When is an air mass termed "warm"?Not learned 3. The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. When should this procedure NOT be used?Not learned 4. You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?Not learned 5. You are approaching a light fitted with a RACON. How is the light identified on the radar?Not learned 6. Which is an area of strong westerly winds occurring between 40°S and 60°S latitude?Not learned 7. The ARPA may swap targets when automatically tracking if two targets are in which situation?Not learned 8. 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 9. What is the average speed of the movement of a hurricane following the recurvature of its track?Not learned 10. Barometer readings in weather reports are given in terms of pressure at which reference location?Not learned 11. Which is the name given to the belt of light and variable winds between the westerly wind belt and the northeast trade winds?Not learned 12. What does a buoy with a composite group-flashing light indicate?Not learned 13. Where are buoys and day beacons exhibiting a yellow triangle or square painted on them used?Not learned 14. Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?Not learned 15. A buoy marking a wreck will show a(n) __________.Not learned 16. Which buoy may be odd numbered?Not learned 17. 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 18. A buoy having red and green horizontal bands would have which light characteristic?Not learned 19. You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. Who should you report this to?Not learned 20. If you are caught in the left semicircle of a tropical storm, in the Southern Hemisphere, which action should you take?Not learned 21. What causes deviation in a magnetic compass?Not learned 22. What causes permanent magnetism on a vessel?Not learned 23. Which is the cause of tropic tides?Not learned 24. What causes variation in a compass?Not learned 25. In the celestial equator system of coordinates, what is comparable to latitude on the terrestrial sphere?Not learned 26. You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to starboard will have the shape indicated by what letter in illustration D045NG below?Not learned 27. What is characteristic of an isophase light?Not learned 28. Which characteristics will a lighted buoy that is to be left to starboard, when entering a U.S. port from seaward have?Not learned 29. What is the characteristic of a quick flashing light?Not learned 30. Which is a characteristic of warm air masses?Not learned 31. You are in charge of a power-driven vessel crossing a river on the Western Rivers. You must keep out of the way of __________.Not learned 32. Your chart indicates that there is an isolated rock and names the rock using vertical letters. What does this indicate?Not learned 33. What do chart legends printed in capital letters indicate about the associated landmark?Not learned 34. A chart position enclosed by a square is a(n) __________.Not learned 35. Civil twilight starts at 1812 zone time on 26 August, your DR position at that time is LAT 21°06'S, LONG 14°56'W. Which statement concerning the planets available for evening sights is TRUE?Not learned 36. A cloud sequence of cirrus, cirrostratus, and altostratus clouds followed by rain usually signifies the approach of which front?Not learned 37. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 38. The Coast Guard Captain of the Port has excluded all traffic from a section of a port, while a regatta is taking place. Which describes the buoys marking this exclusion area?Not learned 39. As a cold front passes how do the pressure and the winds change?Not learned 40. Where can complete information on weather broadcasts throughout the world be found?Not learned 41. Considering the general circulation of the atmosphere, what is the name given to the wind system between latitudes 30°N and 60°N?Not learned 42. By convention, what color is the south pole of a magnet painted?Not learned 43. By convention, the Earth's south magnetic pole is which color?Not learned 44. By convention, the north pole of a magnet is painted which color?Not learned 45. Which corrector will compensate for the deviation which is maximum on intercardinal compass headings?Not learned 46. In which country would you expect the channels to be marked with the IALA-B Buoyage System?Not learned 47. 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 48. You are on course 344°T and take a relative bearing of a lighthouse of 270°. What is the true bearing to the lighthouse?Not learned 49. You are on course 355°T and take a relative bearing of a lighthouse of 275°. What is the true bearing of the lighthouse?Not learned 50. When does a current perpendicular to a vessel's track have the greatest effect on the vessel's course made good?Not learned 51. Which current would you encounter on a direct passage from southern Africa to Argentina, South America?Not learned 52. The Daily Memorandum contains which information?Not learned 53. The most dangerous form of icing encountered at sea is formed by which of the following?Not learned 54. Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?Not learned 55. Where can information about the direction and velocity of rotary tidal currents be found?Not learned 56. Which datum is used for soundings on charts of the East Coast of the United States?Not learned 57. A daymark used to indicate the safe water in a channel will have which of the shapes shown in illustration D045NG below?Not learned 58. The vertical distance from the tidal datum to the level of the water is the __________.Not learned 59. Which describes a diurnal tide?Not learned 60. What does the description "Racon" beside an illustration on a chart mean?Not learned 61. Which device maintains a continuous graphic record of the heading of the vessel?Not learned 62. Which is the difference between the DR position and a fix, both of which have the same time?Not learned 63. The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.Not learned 64. When does a Doppler speed log indicate speed over ground?Not learned 65. ECDIS units incorporate Digital Chart Data that utilizes which formats?Not learned 66. When does the effects of priming of the tides occur?Not learned 67. If the electronic chart is part of an ECDIS, it must display the minimum data required by IMO/IHO. Which is NOT required to be displayed?Not learned 68. You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?Not learned 69. You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the time to intercept if you make 13 knots?Not learned 70. As you enter a U.S. channel from seaward, which is TRUE concerning the numbers on the buoys?Not learned 71. You are entering an east coast port and see a buoy with a yellow triangle painted on it. What does the symbol indicate?Not learned 72. What is the equivalent of 10 min. 52 sec. in arc units?Not learned 73. Which feature, when set to zero, might allow a GPS unit to have an accuracy equivalent to Precise Positioning Service receiver capability?Not learned 74. You will find daily information about the duration of slack water in a port on the Atlantic Coast in which publication?Not learned 75. What does the Flinders bar on a magnetic compass compensate for?Not learned 76. Which of the following is the most accurate method of determining gyrocompass error while underway?Not learned 77. Which of the following are data layer categories to be displayed on ECDIS?Not learned 78. Which of the following describes gyrocompass repeaters which reproduce the indications of the master gyrocompass?Not learned 79. All of the following can be found on a Pilot Chart EXCEPT information concerning which item?Not learned 80. Which of the following must the electronic chart of an ECDIS display, as required by IMO/IHO?Not learned 81. Which form of cloud, that is often known as "mackerel sky", is generally associated with fair weather?Not learned 82. Which of the four adjustable errors in the sextant causes side error?Not learned 83. A general chart intended for coastwise navigation outside of outlying reefs can have which scale?Not learned 84. The GMT is 0445 and your zone description is +1. What is your zone time?Not learned 85. In which situation does a great circle track provides the maximum saving in distance?Not learned 86. Red lights may appear on which buoys?Not learned 87. What happens to the intensity of a hurricane as it reaches higher latitudes and cooler waters?Not learned 88. You are heading out to sea in a buoyed channel and see a quick flashing green light on a buoy ahead of you. In U.S. waters, how should you leave the buoy?Not learned 89. In the horizon system of coordinates what is equivalent to longitude on the Earth?Not learned 90. Under the IALA-B Buoyage System, when entering from seaward which lateral system buoy as shown in illustration D046NG below, should be left to port?Not learned 91. Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.Not learned 92. Under the IALA-A Buoyage system, a buoy marking the starboard side of the channel when approaching from seaward may have which feature?Not learned 93. Under the IALA-A Buoyage System, when entering from seaward which buoy as shown in illustration D046NG below, should be left to starboard?Not learned 94. Under the IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the safest water in the area is in which location?Not learned 95. In the IALA Maritime Buoyage System, what is a red and white vertically-striped buoy used to indicate?Not learned 96. In illustration D039NG below, what type of cloud is indicated by the number five?Not learned 97. In illustration D044NG below, a pillar buoy is indicated by which letter?Not learned 98. In illustration D044NG below, what type of buoy is indicated by the letter A?Not learned 99. In illustration D045NG below, which shape is a daymark warning of danger?Not learned 100. In illustration D045NG below, what two shapes shown are used to indicate a preferred channel?Not learned 101. You are inbound in a channel marked by a range. The range line is 040°T. You are steering 036°T. The range is in sight as shown in illustration D047NG below, and is closing. Which action should you take?Not learned 102. 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 103. By what means are indications of the master gyrocompass sent to remote repeaters?Not learned 104. Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations, vessels and aircraft?Not learned 105. Information about the pilotage available at Miami harbor may best be obtained from which publication?Not learned 106. At which interval should a traditional spring driven marine chronometer be rewound?Not learned 107. Which item in illustration D034NG below shows a flashing light?Not learned 108. After an item of required safety equipment on a towing vessel fails, the owner or Master must consider numerous factors before continuing the voyage. Which factor should NOT be included in his/her decision?Not learned 109. A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol in illustration D015NG below?Not learned 110. In which situation is the light characteristic of composite group flashing (2 + 1) used in the Aids to Navigation System on the Western Rivers?Not learned 111. The light characteristic of flashing is used in the Aids to Navigation System on the Western Rivers. Which example is required to utilize this characteristic?Not learned 112. Which light characteristic may be used on a special mark?Not learned 113. Which term is given to a light that has a light period shorter than its dark period?Not learned 114. The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 15 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?Not learned 115. The Light List shows that a navigational light has a nominal range of 18 miles and a height above water of 22 feet (6.7 meters). Your height of eye is 16 feet (4.9 meters) and the visibility is 2.0 miles. At which approximate range will you first sight the light?Not learned 116. The Light List shows that a navigational light has a nominal range of 19 miles and a height above water of 52 feet (15.8 meters). Your height of eye is 42 feet (12.8 meters) and the visibility is 10.0 miles. At what approximate range will you first sight the light?Not learned 117. The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 47 feet (14.3 meters) and the visibility is 1.5 miles. At what approximate range will you first sight the light?Not learned 118. What is the light phase characteristic of a lighted isolated-danger mark?Not learned 119. Lighted white and orange buoys must show which color light?Not learned 120. A line on the Earth parallel to the equator is a __________.Not learned 121. The LMT of LAN is 1210. Your longitude is 70°30'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?Not learned 122. Local sidereal time is equal to the __________.Not learned 123. Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 2152, 10 January?Not learned 124. You are in LONG 165°E, zone time at 0400, 1 November. What is the zone time and date in LONG 165°W?Not learned 125. What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?Not learned 126. What is magnetic dip a measurement of?Not learned 127. When making landfall at night, the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon. Which term describes this light?Not learned 128. How many characters does the short text messaging feature of the automatic identification system (AIS) allow for?Not learned 129. How many high waters usually occur each day on the East Coast of the United States?Not learned 130. Mean low water is the average height of __________.Not learned 131. Mean lower low water is the reference plane used for which measurements?Not learned 132. The measurement of local time is based on the passage of the Sun over the __________.Not learned 133. Which term is given to the mechanical lifting of air by the upslope slant of the terrain?Not learned 134. A mid-channel buoy, may show which light?Not learned 135. When the moon is new or full, which type of tides occur?Not learned 136. What must the owner or Master do if any of the towing vessel's required navigational safety equipment fails during a voyage?Not learned 137. The National Oceanic and Atmospheric Administration publishes which item?Not learned 138. Which Naval Control of Shipping publication should be aboard your vessel?Not learned 139. 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 140. While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's foghorn 4 1/2 seconds after the signal was sounded. What is the distance to the shore?Not learned 141. Which is TRUE when navigating a vessel?Not learned 142. Which navigational mark may only be lettered?Not learned 143. A navigator fixing a vessel's position by radar __________.Not learned 144. In the Northern Hemisphere, the right half of the storm is known as the dangerous semicircle. Which statement(s) is/are TRUE?Not learned 145. 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 146. In the Northern Hemisphere, your vessel is believed to be in the direct path of a hurricane, and plenty of sea room is available. Which is the best course of action?Not learned 147. What does the numeral in the center of a wind rose circle on a pilot chart indicate?Not learned 148. Which is TRUE of an occulting light?Not learned 149. You are operating on the Red River Waterway and two different air masses of differing characteristics are converging at your location. What weather phenomenon is in your vicinity?Not learned 150. An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol?Not learned 151. An orange and white buoy with a rectangle on it displays what information?Not learned 152. In order to remove side error from a sextant, which adjustment can be made?Not learned 153. 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 154. The owner or Master of a towing vessel must ensure that each person that directs and controls the movement of the vessel knows all of the following EXCEPT _________.Not learned 155. The owner or Master of a towing vessel shall ensure that each person that directs and controls the movement of the vessel can accomplish all of the following EXCEPT _________.Not learned 156. Which part of a sextant is mounted directly over the pivot of the index arm?Not learned 157. A pilot chart does NOT contain information about which item?Not learned 158. When plotting a circle of equal altitude for a high altitude sight, the radius of the circle is determined by which formula?Not learned 159. On the pole side of the high-pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients are diverted by the Earth's rotation toward the east. What is the name of these winds?Not learned 160. To predict the actual depth of water using the Tide Tables, how does one use the number obtained from the Tide Tables?Not learned 161. How do preferred channel buoys indicate the preferred channel to transit?Not learned 162. Which process allows you to determine the chronometer error?Not learned 163. Which publication lists Class I and II private aids to navigation in or along navigable waters of the United States?Not learned 164. Which publication would NOT be used on a voyage from Houston to New York?Not learned 165. When pushing barges ahead close to a steep revetment where there is no current, what is MOST likely to occur?Not learned 166. Quadrantal error in a gyrocompass has its GREATEST effect on which of the following?Not learned 167. Which radar control shortens all echoes on the display and reduces clutter caused by rain or snow?Not learned 168. Your radar displays your ship off center. As you proceed on your course, your ship's marker moves on the PPI scope while echoes from land masses remain stationary. What is this display called?Not learned 169. Radar makes the most accurate determination of the __________.Not learned 170. What is the reaction of a gyrocompass to an applied force known as?Not learned 171. What do red sectors of navigation lights warn mariners of?Not learned 172. Which is the reference datum used in determining the heights of land features on most charts?Not learned 173. With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.Not learned 174. In some river mouths and estuaries, the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream. Which term describes this occurrence?Not learned 175. You are running parallel to the coast and estimate that the current is against you. In plotting a running fix using bearings from the same object on the coast, the greatest safety margin from inshore dangers will result if what speed is used to determine the fix?Not learned 176. A sailing chart could have which scale?Not learned 177. The Sailing Directions are published in the Enroute format and which other format?Not learned 178. 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 179. You are sailing south on the Intracoastal Waterway (ICW) when you sight a green can buoy with a yellow square painted on it. Which of the following is TRUE?Not learned 180. 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 181. You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow triangle painted on it. Which statement is TRUE?Not learned 182. The scale on a chart is given as 1:5,000,000. What does this ratio indicate?Not learned 183. Which scale is considered a coastal chart used for inshore coastwise navigation?Not learned 184. Which scale is used to estimate wind speed by observing sea conditions?Not learned 185. The set of the current is the __________.Not learned 186. A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?Not learned 187. The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean __________.Not learned 188. 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 189. 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 190. 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 191. A special mark (yellow buoy), if lighted, may exhibit which light rhythm?Not learned 192. What is a "Special Warning"?Not learned 193. What is the standard atmospheric pressure in millibars?Not learned 194. Which is the standard meridian for the time zone +1?Not learned 195. Which statement about the Flinders bar of the magnetic compass is CORRECT?Not learned 196. Which statement about gyrocompass error is TRUE?Not learned 197. You sight an isolated danger buoy with a white flashing light showing a group of two flashes. The buoy indicates you should take which action?Not learned 198. 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 199. You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. Which is TRUE concerning the buoy?Not learned 200. You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take?Not learned 201. 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 202. 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 203. A storm's track is characterized by all of the following except __________.Not learned 204. Swell is the rise and fall of the ocean's surface due to __________.Not learned 205. A sylphon cell is a part of which instrument?Not learned 206. 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 207. You take a bearing of 264° of a lighthouse. Which bearing of another object would give the best fix?Not learned 208. You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?Not learned 209. What does the term "tide" refer to?Not learned 210. Which term is used to describe a generally circular low-pressure area?Not learned 211. Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?Not learned 212. Which time meridian is used for tide computations in New York Harbor?Not learned 213. Which topmark shown in illustration D023NG below identifies an isolated danger?Not learned 214. A towing vessel is NOT required to be fitted with radar if it is __________.Not learned 215. Tropical cyclones normally form within which of the following belts of latitude?Not learned 216. Which is TRUE of an aneroid barometer?Not learned 217. Which is TRUE of a bluff bar?Not learned 218. Which is TRUE concern the horizon glass of a sextant?Not learned 219. Which is TRUE of a downbound power-driven vessel, when meeting an upbound vessel on the Western Rivers?Not learned 220. Which is TRUE of a preferred-channel buoy?Not learned 221. Which is TRUE when using the radar for navigation?Not learned 222. 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 223. Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?Not learned 224. Which type of cloud formation should be of immediate concern to small craft operators?Not learned 225. Under the Uniform State Waterway Marking System how is a mooring buoy painted?Not learned 226. It is unlawful to approach within how many yards of a Northern Right Whale?Not learned 227. While upbound through Memphis, the weather report on TV news indicates that a warm front is stationary over Kentucky - Missouri - Tennessee areas. What weather conditions should you expect?Not learned 228. 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 229. When using an echo sounder in deep water, it is NOT unusual to encounter which situation?Not learned 230. Using the surface analysis in illustration D049NG below, which wind speeds are reported at position A?Not learned 231. When utilizing a Pacific Coast chart, which is the reference plane of soundings?Not learned 232. The velocity of the apparent wind can be more than the true wind, and come from the same direction, if certain conditions are present. One condition is that the __________.Not learned 233. A vessel crossing a river on the Western Rivers, must keep out of the way of which power-driven vessel?Not learned 234. Your 1600 GRT vessel will be entering the navigable waters of the United States. You are required by regulations to take which action?Not learned 235. 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 236. 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 237. 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 238. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B- 80 as seen in illustration D041NG below. Twenty-five percent of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 062° relative at 13 knots. You are on course 238°T at 22 knots. How should you encode group Nddff?Not learned 239. INLAND ONLY A power-driven vessel proceeding downstream in a narrow channel on the Western Rivers sights another power-driven vessel moving upstream. Which vessel has the right of way?Not learned 240. When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.Not learned 241. In waters where the cardinal system is used where would you expect to find danger?Not learned 242. If your weather bulletin shows the center of a low-pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?Not learned 243. Weather warnings such as gale, storm and hurricane warnings are based on which criteria?Not learned 244. For a well-made and well-maintained sextant, the maximum value of which correction is usually so small that it can be ignored?Not learned 245. What does a white buoy with an orange cross within a diamond marked on it indicate?Not learned 246. Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent?Not learned 247. Which wind results from a land mass cooling more quickly at night than an adjacent water area?Not learned 248. Why is the wind velocity higher in the dangerous semicircle of a tropical cyclone?Not learned 249. When within 300 miles of a named tropical storm or hurricane, it is standard practice to send weather reports at which time interval?Not learned 250. In working out a local apparent noon sight for your latitude, you subtract the Ho from 90°. The 90° represents the angular distance from __________.Not learned 251. Where would you expect to find channels marked with the IALA-A Buoyage System?Not learned 252. Where would you find information about the time of high tide at a specific location on a particular day of the year?Not learned 253. Yesterday your chronometer read 02h 59m 58s at the 1500 GMT time tick. Today the chronometer reads 03h 00m 02s at the 1500 GMT time tick. What is the chronometer error?Not learned 254. Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 54s at the 1500 GMT time tick. What is the chronometer rate?Not learned 255. 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 256. The zenith is the point on the celestial sphere that is __________.Not learned 257. Under the IALA Buoyage Systems, a cardinal mark may NOT be used to indicate which of the following?Not learned 258. 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 259. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 260. You are in a channel inbound from sea. A daymark used to mark a channel junction, when the preferred channel is to port will have the shape indicated by what letter in illustration D045NG below?Not learned 261. Which item in illustration D034NG below shows a fixed and flashing light?Not learned 262. What will a buoy marking a wreck show?Not learned 263. The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?Not learned 264. The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 14 miles and your height of eye is 20 feet, at which approximate distance will you sight the light?Not learned