A.the shore is bluff and rocky
B.of offshore exposed rocks
C.submerged reefs cause prominent breakers
D.the lookout tower is marked with radar reflectors
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A.a few centimeters
B.a few fathoms
C.a few meters
D.a few feet
A.gain control
B.sensitivity time control
C.fast time constant
D.pulse length control
A.sensitivity time control (sea clutter control)
B.receiver gain control
C.brilliance control
D.fast time constant (differentiator)
A.sensitivity time control (sea-clutter control)
B.receiver gain control
C.brilliance control
D.fast time constant (differentiator)
A.congesting
B.congested
C.congestion
D.congest
最新試題
Your ARPA has automatic speed inputs from the log．Due to currents，the log is indicating a faster speed than the speed over the ground.What should you expect under these circumstances（）.
What will cause the ARPA to emit a visual alarm，audible alarm，or both?（）
What provides little or no indication that a vessel is dragging anchor? （）
（）is not a job of the radar antenna.
Which statement is true concerning a vessel equipped with operational radar?（）.
Radar reflectors are required for（）.
Your ARPA has been tracking a target and has generated the targets course and speed.The radar did not receive a target echo on its last two scans due to the weather.What should you expect under these circumstances（）.
When using the ARPA in heavy rain，which action should you take? （）
When using a radar in a unstabilized mode，fixes are determined most easily from（）.
Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? （）