A.in a straight line B.to port C.from side to side D.to starboard
A.permits the rudder to move faster B.generates more power C.can turn without using her rudder D.can suck the water away from the rudder
A.the masthead lights for a towing vessel B.the lights for a vessel restricted in its ability to maneuver C.sidelights，sternlight and towing light D.All of the above
A.toward the inside of the bend B.toward the outside of the bend C.toward the center of the river just before the bend，then change course for the river's center after the bend D.in the river's center
A.start towing by pushing ahead B.abandon the towing vessel C.retrieve the tow bridle D.relieve strain on the retrieving line
