单项选择题
A.sensitivity time control (sea-clutter control) B.receiver gain control C.brilliance control D.fast time constant (differentiator)
The officer of the watch should use radar when appropri...
单项选择题The officer of the watch should use radar when appropriate and at all times in（）waters.
A.congesting B.congested C.congestion D.congest
The fitting of an efficient radar reflector is likely t...
单项选择题The fitting of an efficient radar reflector is likely to considerably increase the ship’s probability of（）.
A.detection B.being detected C.the detective D.the detected
The description Racon beside an illustration on a chart...
单项选择题The description Racon beside an illustration on a chart would mean a（）.
A.radar transponder beacon B.radar conspicuous beacon C.radar calibration beacon D.circular radiobeacon
