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
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
When changing from a compass course to a true course you should apply（）.
The most accurate method of determining gyrocompass error while underway is by（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
What is the basic principle of the magnetic compass?（）
In more recent years，（）has been used by civilians in many new ways to determine positions，such as in automobile and boat navigation，hiking，emergency rescue，and precision agriculture and mining.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.