Q190 - Navigation General: Near Coastal, 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. 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 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. Which is TRUE of an alternating light?Not learned 7. 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 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. What is the approximate geographic visibility of an object with a height above the water of 70 feet, for an observer with a height of eye of 65 feet?Not learned 10. The ARPA may swap targets when automatically tracking if two targets are in which situation?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 are associated with Cumulonimbus clouds?Not learned 13. Atmospheric pressure may be measured with which instrument?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. The Beaufort scale is used to estimate which element of the weather?Not learned 17. What benefit is a weather bulletin to a mariner?Not learned 18. Which best defines current?Not learned 19. Which of the buoys listed below could be used to mark an anchorage?Not learned 20. How are buoys which mark isolated dangers painted?Not learned 21. Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?Not learned 22. Which buoy may be even numbered?Not learned 23. What causes deviation in a magnetic compass?Not learned 24. Which causes the Earth's irregular heating?Not learned 25. What can cause a tsunami?Not learned 26. What is a characteristic of cardinal marks?Not learned 27. Which characteristic and color will a preferred-channel buoy show?Not learned 28. What do chart legends printed in capital letters indicate about the associated landmark?Not learned 29. 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 30. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 31. 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 32. When cold air displaces warm air, you have which type of front?Not learned 33. What color lights do lighted information markers display?Not learned 34. What are the colors of a mid-channel daymark?Not learned 35. What is a common unit of measure for atmospheric pressure?Not learned 36. Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?Not learned 37. Which condition(s) is(are) necessary for the formation of dew?Not learned 38. Which condition would most likely result in fog?Not learned 39. By convention, the Earth's south magnetic pole is which color?Not learned 40. Which corrector will compensate for the deviation which is maximum on intercardinal compass headings?Not learned 41. 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 42. You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?Not learned 43. You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?Not learned 44. 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 45. If the current and wind are in the same direction, what does the sea surface represent concern the true wind speed?Not learned 46. The most dangerous form of icing encountered at sea is formed by which of the following?Not learned 47. 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 48. When daylight savings time is kept, the times of tide and current calculations must be adjusted. How can this be accomplished?Not learned 49. Which daymark has no lateral significance?Not learned 50. When should your dead reckoning position be plotted?Not learned 51. What describes an accurate position that is NOT based on any prior position?Not learned 52. The vertical distance from the tidal datum to the level of the water is the __________.Not learned 53. 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 54. Which is TRUE for the directive force acting on a gyrocompass?Not learned 55. What is the distance from the bottom of a wave trough to the top of a wave crest?Not learned 56. What does a Doppler log in the bottom return mode indicate?Not learned 57. A Doppler speed log indicates speed through the water __________.Not learned 58. When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.Not learned 59. 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 60. ECDIS must give an alarm for which of the following cases?Not learned 61. ECDIS units incorporate Digital Chart Data that utilizes which formats?Not learned 62. When does the effects of priming of the tides occur?Not learned 63. An electronic depth finder operates on which principle?Not learned 64. What enables you to estimate the bearing of a storm's center?Not learned 65. 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 66. 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 67. As you enter a U.S. channel from seaward, which is TRUE concerning the numbers on the buoys?Not learned 68. When entering from seaward, what does a buoy displaying a composite group (2+1) flashing red light indicate?Not learned 69. When entering from seaward, what does a buoy displaying a single-flashing red light indicate?Not learned 70. What can be expected with the presence of stratus clouds and a dying wind?Not learned 71. What does the expression "the air is saturated" mean?Not learned 72. Which is a feature of a special daymark?Not learned 73. You will find daily information about the duration of slack water in a port on the Atlantic Coast in which publication?Not learned 74. Fog forms when the air temperature is at or below __________.Not learned 75. Fog is formed when which condition exists?Not learned 76. How can you follow the approach of a dangerous cyclonic storm?Not learned 77. Which of the following data layer categories is NOT displayed on ECDIS?Not learned 78. Which of the following describes the difference between true heading and magnetic heading?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. Which government agency publishes the U.S. Coast Pilot?Not learned 82. When is the greatest directive horizontal force exerted on the magnetic compass of a vessel?Not learned 83. Red lights may appear on which buoys?Not learned 84. What is the gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction?Not learned 85. What happens to the intensity of a hurricane as it reaches higher latitudes and cooler waters?Not learned 86. You are heading in a northerly direction when you come across an easterly current. Your vessel will respond in which manner?Not learned 87. The height of a light is measured from which reference plane?Not learned 88. Which is TRUE when a high pressure system is centered north of your vessel in the Northern Hemisphere?Not learned 89. Under the IALA-B Buoyage System, when entering from seaward, a buoy that should be left to port will be which color?Not learned 90. In the IALA Buoyage System, what do buoys with alternating red and green horizontal bands indicate?Not learned 91. In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, which is TRUE when fitted with lights?Not learned 92. Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?Not learned 93. Under the IALA Buoyage Systems, which is TRUE of the topmark of a red and white vertically-striped buoy?Not learned 94. Under the IALA Buoyage System, which topmark shown in illustration D023NG below will be displayed on a safe watermark?Not learned 95. Under the IALA Buoyage Systems, which is TRUE of safe water marks?Not learned 96. Under the IALA cardinal system, what does a mark with a quick white light showing 6 flashes followed by one long flash indicate in relation to the location of the safest water?Not learned 97. In the IALA Maritime Buoyage System, what is a red and white vertically-striped buoy used to indicate?Not learned 98. Illustration D011NG below represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE?Not learned 99. In illustration D039NG below, what type of cloud is indicated by the number one?Not learned 100. In illustration D051NG below what is indicated by the position labeled "C"?Not learned 101. 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 102. What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?Not learned 103. By what means are indications of the master gyrocompass sent to remote repeaters?Not learned 104. What information is NOT found in the chart title?Not learned 105. Information about the pilotage available at Miami harbor may best be obtained from which publication?Not learned 106. How are you informed of defects or changes in aids to navigation?Not learned 107. What is used to measure wind velocity?Not learned 108. Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?Not learned 109. Which is TRUE of a lateral system buoy displaying a quick flashing light?Not learned 110. A latitude line will be obtained by observing a body __________.Not learned 111. Which level of accuracy can be obtained utilizing the U.S. Coast Guard's Maritime Differential GPS in an established coverage area?Not learned 112. Which light characteristic may be used on a special mark?Not learned 113. Which light characteristic may be used on a special purpose mark?Not learned 114. 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 115. The Light List indicates that a dayboard is a type KGW. You should take which action?Not learned 116. The Light List shows that a navigational light has a nominal range of 10 miles and a height above water of 38 feet (11.6 meters). Your height of eye is 52 feet (15.8 meters) and the visibility is 11.0 miles. At which approximate range will you first sight the light?Not learned 117. 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 118. What is the light phase characteristic of a lighted isolated-danger mark?Not learned 119. Which would you expect to see on a lighted preferred-channel buoy?Not learned 120. Which line connects the points of zero magnetic dip?Not learned 121. A line of position is __________.Not learned 122. Which term is given to a line on a weather chart connecting places which have the same barometric pressure?Not learned 123. 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 124. Which of the listed properties does warm air possess?Not learned 125. What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?Not learned 126. At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.Not learned 127. How many fixed objects are needed to plot a running fix?Not learned 128. Which maritime radio system, consisting of a series of coast stations, transmits coastal warnings?Not learned 129. How may a spherical buoy be identified?Not learned 130. Mean lower low water is the reference plane used for which measurements?Not learned 131. Which term is given to the mechanical lifting of air by the upslope slant of the terrain?Not learned 132. Which type of projection is used to make a Mercator chart?Not learned 133. Which meteorological feature controls the climate of the Gulf of Mexico and the coastal area during late spring and summer?Not learned 134. A mid-channel buoy, may show which light?Not learned 135. In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT one of these factors?Not learned 136. In modern fathometers, what produces the sonic or ultrasonic sound waves?Not learned 137. In which months will the North Equatorial Countercurrent be strongest?Not learned 138. When the moon is at first quarter or third quarter phase, what type of tides will occur?Not learned 139. A mooring buoy, if lighted, shows which color light?Not learned 140. Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?Not learned 141. Which Naval Control of Shipping publication should be aboard your vessel?Not learned 142. The navigation regulations applicable to a U.S. inland waterway can be found in which publication?Not learned 143. In North America, which direction do the majority of the weather systems move?Not learned 144. How can Northern right whales can be identified?Not learned 145. If an observer in the Northern Hemisphere faces the surface wind, where is the center of low pressure located?Not learned 146. 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 147. An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?Not learned 148. An orange and white buoy with a rectangle on it displays what information?Not learned 149. Which term defines the paths of intended travel between three or more points?Not learned 150. When is the peak of the hurricane season in the western North Pacific?Not learned 151. You are planning to enter an unfamiliar U.S. port. Which publication provides information about channel depths, dangers, obstructions, anchorages, and marine facilities available in that port?Not learned 152. You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?Not learned 153. 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 154. Which position includes the effects of wind and current?Not learned 155. How do preferred channel buoys indicate the preferred channel to transit?Not learned 156. When do the prevailing westerlies of the Southern Hemisphere blow 17-27 knots?Not learned 157. What is the primary source of the earth's weather?Not learned 158. Prior to reading an aneroid barometer, why should you tap the face lightly with your finger?Not learned 159. 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 160. "Proceeding from seaward" for the purpose of the direction of buoying offshore, lateral system buoys would be proceeding ________.Not learned 161. Quadrantal error in a gyrocompass has its GREATEST effect on which of the following?Not learned 162. Which radar control shortens all echoes on the display and reduces clutter caused by rain or snow?Not learned 163. Radar makes the most accurate determination of the __________.Not learned 164. Which is TRUE of Raster-scan chart data?Not learned 165. What is the reaction of a gyrocompass to an applied force known as?Not learned 166. What do red sectors of navigation lights warn mariners of?Not learned 167. What is the relative bearing of an object on the port beam?Not learned 168. 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 169. With respect to a reversing current, when does slack water occur?Not learned 170. What results when warm moist air blows over a colder surface and is cooled below its dew point?Not learned 171. Safe water buoys may show ONLY which type of light?Not learned 172. How is a safe water mark, that can be passed close aboard on either side, painted and lighted?Not learned 173. A sailing chart could have which scale?Not learned 174. 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 175. A ship is on course 195° at a speed of 15 knots. The apparent wind is from 40° on the port bow, speed 30 knots. What are the direction and speed of the true wind?Not learned 176. 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 177. What is a sling psychrometer used to measure?Not learned 178. What does a slow rise in the barometric pressure forecast?Not learned 179. In which source could you find the number of a chart for a certain geographic area?Not learned 180. In the Southern Hemisphere winds in a low pressure system rotate in which direction?Not learned 181. The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass?Not learned 182. Which statement concerning the chartlet seen in illustration D010NG below is TRUE? (Soundings and heights are in meters)Not learned 183. Which statement about gyrocompass error is TRUE?Not learned 184. Which statement is TRUE for an unlighted, red and green, horizontally-banded buoy with the topmost band red?Not learned 185. 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 186. 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 187. 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 188. 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 189. What is a system of reservoirs and connecting tubes in a gyro compass called?Not learned 190. You take a bearing of 086° of a lighthouse. What bearing of another object would give the best fix?Not learned 191. You take a bearing of 086° of a lighthouse. Which bearing of another object would give the best fix?Not learned 192. You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix?Not learned 193. Which is TRUE as the temperature of the air reaches the dew point?Not learned 194. Temperature and moisture characteristics are modified in a warm or cold air mass due to which factor?Not learned 195. Which term defines the difference between the heights of low and high tides?Not learned 196. Which is the term given to the time required for a lighted aid to complete a full cycle of light changes?Not learned 197. Which term refers to the direction a current is flowing?Not learned 198. Which term is used to describe a generally circular low-pressure area?Not learned 199. 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 200. Which term is used to describe the time interval between successive wave crests?Not learned 201. Which term is used to describe the wind speed and direction observed from a moving vessel?Not learned 202. Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?Not learned 203. Which topmark shown in illustration D023NG below identifies an isolated danger?Not learned 204. 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 205. In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is located in which position?Not learned 206. Tropical storms and hurricanes are most likely to form in the Southern hemisphere during which months?Not learned 207. Which is TRUE of an aneroid barometer?Not learned 208. Which is TRUE if the compass error of a magnetic compass has no deviation?Not learned 209. Which is TRUE concerning the length of a wave?Not learned 210. Which is TRUE concerning the magnetic information on a chart?Not learned 211. Which is TRUE of the direction of flow (channel) on the Corps of Engineer's Navigation Maps?Not learned 212. Which is TRUE of a special mark?Not learned 213. When trying to sight a lighthouse you notice a glare from a town in the background. How does this affect the range at which the light may be sighted?Not learned 214. What type of clouds are associated with a cold front?Not learned 215. Which type of cloud is hail most likely to fall from?Not learned 216. Which type of daymark is used to mark the starboard side of the channel when entering from sea?Not learned 217. Which type of fog occurs on clear nights with very light breezes and forms when the earth cools rapidly?Not learned 218. Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level?Not learned 219. Under the U.S. Aids to Navigation System, a special mark possesses which of the following characteristics?Not learned 220. 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 221. 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 222. 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 223. You are underway in the North Sea on course 216°T when you sight a buoy bearing 021° relative. Under the IALA Buoyage System, you are in the best navigable water if the buoy has which of the following characteristics?Not learned 224. You are underway in a vessel with a draft of 6.0 feet. You are in an area where the charted depth of the water is 4 fathoms. You would expect the depth of water beneath your keel to be approximately __________.Not learned 225. 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 226. It is unlawful to approach within how many yards of a Northern Right Whale?Not learned 227. When using an echo sounder in deep water, it is NOT unusual to encounter which situation?Not learned 228. When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?Not learned 229. When using a radar in an unstabilized mode, fixes are determined most easily from __________.Not learned 230. The velocity of the apparent wind can be less than the true wind and from the same direction, if certain conditions are present. One condition is that the _________.Not learned 231. 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 232. The vertical component of the Earth's magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation?Not learned 233. Your vessel is located at position I on the weather map in illustration D013NG below. You should experience which weather condition?Not learned 234. 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 235. Vessels should maintain a sharp lookout, especially during December through March, when navigating the Northern Right Whale's only known calving grounds. Where are the calving grounds located?Not learned 236. 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 237. A vessel's position should be plotted using bearings of __________.Not learned 238. What weather change accompanies the passage of a cold front in the Northern Hemisphere?Not learned 239. A weather forecast states that the wind will commence veering. In the Northern Hemisphere, what changes will occur?Not learned 240. Weather information provided by the National Weather Service (NWS) advisories should be used along with which other source of information?Not learned 241. Weather observations provided by each weather station include all of the following except which item?Not learned 242. In a weather report, which defines the term "visibility"?Not learned 243. Weather warnings such as gale, storm and hurricane warnings are based on which criteria?Not learned 244. What does a white buoy with an open-faced orange diamond on it indicate?Not learned 245. What does a white buoy with an orange circle marked on it indicate?Not learned 246. What does a white buoy with an orange rectangle on it indicate?Not learned 247. Yellow lights may appear on which buoys?Not learned 248. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 249. In the illustration, on an ECDIS S-57 compliant ENC, which symbol represents a Zone of Confidence (ZOC) UNot learned 250. Which type of current will have the greatest effect on the course made good for your vessel?Not learned 251. In the illustration, on an ECDIS S-57 compliant ENC, which symbol represents a Zone of Confidence (ZOC) A2Not learned 252. How is an occluded front represented on a weather map?Not learned 253. Geographic range is the maximum distance at which a light may be seen under which conditions?Not learned 254. The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high (11.0 meters). If the visibility is 7.0 miles and your height of eye is 25 feet (7.6 meters), at what approximate distance will you sight the light?Not learned 255. 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 256. The luminous range of a light takes into account which factor?Not learned 257. The Light List shows that a navigational light has a nominal range of 22 miles and a height above water of 48 feet (14.6 meters). Your height of eye is 35 feet (10.7 meters) and the visibility is 20.0 miles. At what approximate range will you first sight the light?Not learned