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
An ECDIS is required to display which information?（）
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
The number of pulses of energy transmitted per second is call the（）.
An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes?（）.
A radar contact will remain stationary on a relative motion radar display only when it is（）.
A Doppler log in the bottom return mode indicates the（）.
（）should be used during the poor visibility if the radar’s screen shows heavy sea returns.
The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.
Deviation in a compass is caused by the（）.