What will be the velocity and direction of the tidal current at Mobile River Entrance, AL, at 0915 CDT (ZD +5) on 13 May 1983?
A) 0.1 knot at 333°T B) 0.3 knot at 333°T C) 0.7 knot at 151°T D) 1.8 knots at 025°T E)NULL
Arşivler Sorular
Which statement about the Flinders bar of the magnetic compass is CORRECT?
A) It compensates for the error caused by the vertical component of the Earth’s magnetic field. B) It compensates for error caused by the heeling of a vessel. C) It compensates for quadrantal deviation. D) It is only needed in…
Which condition would NOT indicate the approach of a tropical storm?
A) Long, high swells B) Cirrus clouds C) Halos about the Sun or Moon D) Decrease in wind velocity E)NULL
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?
A) 45°00’W B) 52°30’W C) 60°00’W D) 67°30’W E)NULL
The expression “first magnitude” is usually used to refer only to bodies of magnitude __________.?
A) 1.5 and greater B) 1.25 and greater C) 1.0 and greater D) 0.5 and greater E)NULL
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?
A) 1.5 miles B) 2.0 miles C) 6.0 miles D) 12.7 miles E)NULL
A light characteristic of composite group flashing indicates that there is a(n) __________.?
A) sharp turn in the channel B) narrowing in the channel at that point C) junction in the channel D) obstruction that must be left to port E)NULL
The characteristic of a lighted cardinal mark may be __________.?
A) very quick flashing B) flashing C) fixed D) occulting E)NULL
When trying to sight a lighthouse you notice a glare from a town in the background. The range at which the light may be sighted due to this glare is __________.?
A) considerably reduced B) increased slightly due to extra lighting C) unchanged D) increased if the light is red or green due to contrast with the glare E)NULL
In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) __________.?
A) apogean tide B) double high water C) perigean tide D) bore E)NULL