单项选择题
In towing，heaving lines are used for（）.
A.passing a tow bridle to the tug
B.passing a messenger line
C.heaving in the tow bridle
D.service lines with rocket line throwers
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相关考题
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单项选择题
In towing it is desirable for the tug and the vessel to ride wave crests simultaneously because（）.
A.shock loading on the tow line is reduce
B.towing speed is improved
C.the vessel is more visible from the tug
D.the catenary of the tow line is reduced -
单项选择题
In order to back a right-handed，single-screw vessel in a straight line，you will probably need to use（）.
A.very little rudder
B.some left rudder
C.some right rudder
D.full left rudder -
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
