单项选择题
A.starboard side to the wharf B.either side to the wharf C.port side to the wharf D.stern to the wharf
In twin-screw engine installations while going ahead，ma...
单项选择题In twin-screw engine installations while going ahead，maneuvering qualities are most effective when the tops of the propeller blades both turn（）.
A.to starboard B.outboard from the center C.to port D.inboard toward the center
In towing，heaving lines are used for（）.A.passing a tow ...
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
In towing it is desirable for the tug and the vessel to...
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
