A.Heeling magnet
B.Flinders bar
C.Fore-and-aft magnets
D.All of the above can be set on magnetic east or magnetic west headings
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A.Quadrantal spheres
B.Heeling magnets
C.Flinders bar
D.Fore-and-aft magnets
A.The soft iron spheres on the arms of the binnacle
B.Magnets placed in trays inside the binnacle
C.A single vertical magnet beneath the compass
D.The Flinders bar
A.Course per magnetic steering compass
B.Gyro error
C.Variation
D.Maximum rudder angle previously used
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
最新試題
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
Which compensates for errors introduced when the vessel heels over（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
What is an advantage of the magnetic compass aboard vessels?（）
What is the basic principle of the magnetic compass（）.
Variation in a compass is caused by（）.
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
Variation is the angular measurement between（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.