A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
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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
A.Gain Control
B.Brilliant Control
C.Anti-clutter Sea Control
D.Sweep Intercept
A.KEYLOCK
B.REPEATER
C.STATIC INVERTER
D.ANTI-CLUTTER-SEA
最新試題
A Doppler log in the bottom return mode indicates the（）.
A Doppler log in the volume reverberation mode indicates（）.
Compass error is equal to the（）.
（）is on the panel of radar.
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
Compass deviation is caused by（）.