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
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
Variation is the angular measurement between（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
When changing from a compass course to a true course you should apply（）.
The most accurate method of determining gyrocompass error while underway is by（）.
Which statement about the gyrocompass is FALSE（）.
When relieving the helm，the new helmsman should know the（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.