The spinning of a celestial body about its axis is known as __________.?
A) rotation B) revolution C) space motion D) nutation E)NULL
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When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the __________.?
A) color of the aid B) shape of the aid C) color of the top band D) shape of the yellow mark E)NULL
Your longitude is 124°E, and your local mean time is 0520 on the 5th of the month. The mean time and date at Greenwich is __________.?
A) 1336 on the 4th B) 1336 on the 5th C) 2104 on the 4th D) 2104 on the 5th E)NULL
Deviation in a compass is caused by the __________.?
A) vessel’s geographic position B) vessel’s heading C) earth’s magnetic field D) influence of the magnetic materials of the vessel E)NULL
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?
A) Geometric symbols such as squares and triangles replace letters and numbers on ICW aids to navigation. B) The ICW and another waterway coincide in this geographical area. C) The yellow triangle identifies a sharp turn (over 60°) in the…
With respect to a reversing current, slack water occurs when there is __________.?
A) little or no horizontal motion of the water B) little or no vertical motion of the water C) a weak ebb or flood current D) when winds cause water to back up in a river mouth E)NULL
The primary use of apparent time in marine navigation is to __________.?
A) calculate sunrise or sunset B) determine zone time C) enter an almanac D) determine the time of meridian transit E)NULL
You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You hear a siren being sounded at the facility. What does this indicate?
A) There is danger at the facility due to a fire or cargo release. B) A towboat with a hazardous cargo barge is being moved to or from the facility. C) The facility is warning a barge to shut down…
The dividing meridian between zone descriptions +4 and +5 is __________.?
A) 67°30’W B) 90°00’W C) 67°30’E D) 75°00’E E)NULL
You are underway in the North Sea on course 328°T when you sight a buoy broad on your port bow. You are in the best navigable water if the buoy __________.?
A) has a topmark of two cones with points down B) is a western quadrant buoy C) is painted yellow on the top half and black on the bottom D) exhibits a light with the characteristic of VQ(3)5s E)NULL