A、Black and white stripes with an interrupted quick flashing light
B、Black and red stripes with a Morse (A) light
C、Black and red stripes with an interrupted quick flashing light
D、Red and white stripes with a Morse (A) light
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A、for my vessel crossing safely B、my vessel is to cross safely C、for my vessel to cross safely D、for my vessel's crossing safely
A、It is faster B、It is slower C、There is no change D、It remains constant for varying propeller revolutions
A、safe manning B、trimming C、avoiding collision D、preventing pollution
A、preferred-channel buoys B、starboard- or port-side buoys C、special marks D、safe water buoys
A、The lifeboat is lowered to near the water，loaded with the allowed capacity，lowered into the water until afloat，then released from the falls B、The lifeboat is loaded with the allowed capacity，lowered into the water until afloat，then released from the falls C、The lifeboat is lowered into the water until afloat，loaded with the allowed capacity，then released from the falls D、The lifeboat is lowered to near the water，loaded with the allowed capacity，then released from the falls
A、weight of cable to weight of vessel B、weight of cable to weight of anchor C、length of anchor to depth of water D、length of cable to depth of water
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