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
The Flinders bar on a magnetic compass compensates for the（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
What is an advantage of the magnetic compass aboard vessels?（）
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
Variation is the angular measurement between（）.
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（）.
This induced magnetism（）the permanent magnetism already present in the ship.