单项选择题

A towing vessel is tripped when（）.

A.it is overtaken by the tow
B.it is pulled sideways by the tow
C.the weight of the towing hawser causes loss of maneuverability
D.the propeller is fouled by the towing hawser

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单项选择题

A towing vessel and her tow are severely restricted in their ability to change course. When making way，the towing vessel will show ONLY（）.

A.the masthead lights for a towing vessel
B.the lights for a vessel restricted in her ability to maneuver
C.sidelights，stern light，and towing light
D.All of the above

单项选择题

A tow that is properly aligned to pass through a narrow opening between two bridge piers is （）.

A.on course
B.headed fair
C.holding on
D.in shape