单项选择题
A.the last vessel in the tow B.the last vessel in the tow and it is carrying a crew C.manned，regardless of its position in the tow D.None of the above are correct
In reduced visibility，you hear two prolonged blasts of ...
单项选择题In reduced visibility，you hear two prolonged blasts of a whistle. This signal is sounded by a （）.
A.power-driven vessel dead in the water B.sailing vessel on the port tack C.vessel not under command D.vessel fishing with nets
In order to maintain speed while changing course from a...
单项选择题In order to maintain speed while changing course from a close reach to a broad reach，the sails should be（）.
A.lowered B.reefed C.hauled in D.eased out
In order for a vessel to be engaged in fishing she must...
单项选择题In order for a vessel to be engaged in fishing she must be（）.
A.underway B.using gear which extends more than 50 meters outboard C.using a seine of some type D.using gear which restricts her maneuverability
