A sidereal day is approximately how much shorter than a solar day?
A) 4 minutes B) 8 minutes C) 12 minutes D) 16 minutes E)NULL
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You are preparing to take a tow from San Diego to Portland, OR. Good seamanship would require that you have on board, available for reference and use, all of the following EXCEPT the __________.?
A) Coast Pilot B) harbor and coastal charts for ports of refuge enroute C) Sailing Directions (Enroute) D) Light List E)NULL
The error in a magnetic compass caused by the vessel’s magnetism is called __________.?
A) variation B) deviation C) compass error D) bearing error E)NULL
The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the __________.?
A) doldrums B) horse latitudes C) trade winds D) prevailing westerlies E)NULL
On 29 June 1981 you observe a back sight of the upper limb of the Moon as seen through the sextant’s scope. The sextant altitude (hs) is 114°16.9′. The height of eye is 36 feet and the index error is 2.0′ on the arc. The horizontal parallax is 60.5′. What is the observed altitude (Ho)?
A) 66°31.6′ B) 66°31.0′ C) 66°28.8′ D) 66°26.0′ E)NULL
The difference in local time between an observer on 114°W and one on 119°W is __________.?
A) 1.25 minutes B) 5 minutes C) 20 minutes D) 75 minutes E)NULL
Which buoy will NOT display white retroreflective material?
A) Safe water mark B) Isolated danger mark C) Preferred channel mark D) Daymark of no lateral significance E)NULL
A ship is in longitude 54°00’W on a true course of 090°. The ship’s clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?
A) 45°00’W B) 52°30’W C) 60°00’W D) 67°30’W E)NULL
While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 6 seconds after the signal was sounded. What is the distance to the shore?
A) 1200 yards B) 1100 yards C) 1000 yards D) 900 yards E)NULL
When slanted letters are used to spell the name of a charted object you know the __________.?
A) object is only a hazard to vessels drawing in excess of 20 feet B) position is approximate or doubtful C) object is always visible D) object may cover and uncover with the tide E)NULL