单项选择题
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
The correct method of switching off a marine radar is t...
单项选择题The correct method of switching off a marine radar is to turn power switch to（）position first，then to（）position.
A.off／standby B.standby／off C.standby／close D.close／standby
The common way to obtain your ship’s position is（）.A.ke...
单项选择题The common way to obtain your ship’s position is（）.
A.keeping a close watch and lookout B.taking a radar range and bearing C.observing a radar target and listening to signals D.keeping a well clear caution
