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
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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
A.As many as
B.So many as
C.As much as
D.As more as
最新試題
A Doppler log in the bottom return mode indicates 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?（）.
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
（）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?（）.
An ECDIS is required to display which information?（）
A radar display in which North is always at the top of the screen is a(n)（）.
The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
A Doppler speed log indicates speed over ground（）.