A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
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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
A.At
B.In
C.During
D.With
最新試題
A Doppler log in the bottom return mode indicates the（）.
The number of pulses of energy transmitted per second is call the（）.
Error may be introduced into a magnetic compass by（）.
A deadhead is a(n)（）.
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
Compass deviation is caused by（）.
Deviation is the angle between the（）.
An ECDIS is required to display which information?（）
（）is on the panel of radar.
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（）.