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
What is the basic principle of the magnetic compass（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
When relieving the helm，the new helmsman should know the（）.
What is an advantage of the magnetic compass aboard vessels?（）
While in drydock your vessel will be belt-gauged.This process involves（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
This induced magnetism（）the permanent magnetism already present in the ship.
When crossing the magnetic equator the（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.