A.It compensates for the error caused by the vertical component of the Earth's magnetic field
B.It compensates for error caused by the heeling of a vessel
C.It compensates for quadrantal deviation
D.It is only needed in equatorial waters
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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
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
最新試題
When adjusting a magnetic compass for error，a deviation table should be made（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
When relieving the helm，the new helmsman should know the（）.
Variation in a compass is caused by（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
The quadrantal spheres are used to（）.
What is an advantage of the magnetic compass aboard vessels?（）
What is the name of the movable，radial guide line used to measure direction on a radar?（）
The Flinders bar on a magnetic compass compensates for the（）.