單項選擇題On open waters,a power-driven vessel shall keep out of the way of a().

A.vessel on her port side that is crossing her course
B.vessel that is overtaking her
C.seaplane on the water
D.sailing vessel


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4.單項選擇題In restricted visibility a towed vessel must sound a fog signal when it is().

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

5.單項選擇題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