A.persistence
B.pulse repetition rate
C.pulse length
D.resolution
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A.Relative
B.TRUE
C.Compass
D.Magnetic
A.magnetism from the earth's magnetic field
B.misalignment of the compass
C.magnetism within the vessel
D.a dirty compass housing
A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading
A.vessel's geographic position
B.vessel's heading
C.earth's magnetic field
D.influence of the magnetic materials of the vessel
A.true meridian and the axis of the compass card
B.true meridian and the magnetic meridian
C.magnetic meridian and the axis of the compass card
D.axis of the compass card and the degaussing meridian
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Deviation in a compass is caused by the（）.
Error may be introduced into a magnetic compass by（）.
A deadhead is a(n)（）.
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
A FICTIVE LINE DISPLAYED ON THE RADAR SCREEN SEPARATING THE FAIRWAY FOR INBOUND AND OUTBOUND VESSELS SO THAT THEY CAN SAFELY PASS EACH OTHER defines（）.
A radar display in which North is always at the top of the screen is a(n)（）.
（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
A radar contact will remain stationary on a relative motion radar display only when it is（）.
Deviation is the angle between the（）.
An ECDIS is required to display which information?（）