A.Quadrantal spheres
B.Heeling magnets
C.Flinders bar
D.Fore-and-aft magnets
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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
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
最新試題
By convention，the north seeking ends of a compass’ magnets are colored（）.
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（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
While in drydock your vessel will be belt-gauged.This process involves（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
Variation in a compass is caused by（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
What is the basic principle of the magnetic compass?（）
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.