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
When crossing the magnetic equator the（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
This induced magnetism（）the permanent magnetism already present in the ship.
What is the basic principle of the magnetic compass?（）
Which statement about the gyrocompass is FALSE（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
What is an advantage of the magnetic compass aboard vessels?（）
When changing from a compass course to a true course you should apply（）.