A.Compass rose
B.Cursor
C.Plan position indicator
D.Variable range marker
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A.Magnetic materials of the same polarity repel each other and those of opposite polarity attract
B.The Earth's magnetic lines of force are parallel to the surface of the Earth
C.Magnetic meridians connect points of equal magnetic variation
D.The compass needle(s) will，when properly compensated，lie parallel to the isogonic lines of the Earth
A.Compass error is negligible at or near the earth's magnetic poles
B.It does not have to be checked as often
C.It is reliable due to it's essential simplicity
D.All points on the compass rose are readily visible
A.Quadrantal spheres
B.Heeling magnets
C.Athwartships magnets
D.Fore-and-aft magnets
A.compass north and magnetic north
B.compass north and true north
C.magnetic meridian and the geographic meridian
D.your vessel's heading and the magnetic meridian
A.can correct by adjusting the compass card
B.can correct by adjusting the compensating magnets
C.can correct by changing the vessel's heading
D.cannot correct
最新試題
By convention，the north seeking ends of a compass’ magnets are colored（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
When relieving the helm，the new helmsman should know the（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
Which compensates for errors introduced when the vessel heels over（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
Variation in a compass is caused by（）.
The quadrantal spheres are used to（）.
Variation is the angular measurement between（）.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）