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
The line which connects the points of zero magnetic dip is（）.
Variation is a compass error that you（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
The quadrantal spheres are used to（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
When relieving the helm，the new helmsman should know the（）.