A.Course per magnetic steering compass
B.Gyro error
C.Variation
D.Maximum rudder angle previously used
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A.Flinders bar should be inverted
B.Heeling magnet should be inverted
C.The quadrantal spheres should be rotated 180°
D.Flinders bar should be moved to the opposite side of the binnacle
A.Flinders bar
B.Soft iron spheres
C.Fore-and-aft permanent magnets in their trays
D.Heeling magnet
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.Worn gears in the compass housing
B.Magnetism from the earth's magnetic field
C.Magnetism within the vessel
D.Lack of oil in the compass bearings
A.will add to
B.will subtract from
C.may add to or subtract from
D.will not change
最新試題
A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°.Which action should be taken to remove this error during compass adjustment（）.
The Flinders bar on a magnetic compass compensates for the（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
What is the basic principle of the magnetic compass?（）
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（）.
The quadrantal spheres are used to（）.
Variation is the angular measurement between（）.
What is the basic principle of the magnetic compass（）.