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
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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
A.Worn gears in the compass housing
B.Magnetism from the earth's magnetic field
C.Magnetism within the vessel
D.Lack of oil in the compass bearings
最新試題
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
Variation is the angular measurement between（）.
What is the basic principle of the magnetic compass?（）
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
The quadrantal spheres are used to（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
When a magnetic compass is not in use for a prolonged period of time it should（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.