A.Separated line
B.Divided line
C.Reference line
D.Segregated line
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A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water
A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
A.tree or log awash in a nearly vertical position
B.crew member who refuses to work
C.upstream end of a land wall
D.buoy that is adrift
A.high pressure system
B.low pressure system
C.high dew point
D.low dew point
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Compass error is equal to the().
A Doppler speed log indicates speed over ground().
Deviation in a compass is caused by the().
A radar display which is oriented,so that north is always at the top of the screen,is called a(n)().
A radar contact will remain stationary on a relative motion radar display only when it is().
Compass deviation is caused by().
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 range to a small,charted object such as a light will provide a line of position in which form?().
()the canal transit,the radar was operating.
An electronic depth finder operates on the principle that().