单项选择题
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
The closest point of approach (CPA) of a contact on a r...
单项选择题The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）.
A.immediately when the contact is noted on radar B.only if the radar scope is watched constantly C.after the contact has been marked at least twice D.by an occasional glance at the radar
