A vessel is considered to be restricted in her ability to maneuver under the Rules if she is （）.

单项选择题A vessel fitted with twin screws is easier in（）than a vessel with single screw.

A.turning maneuver
B.course setting
C.position fixing
D.regulating speed

单项选择题A twin-screw vessel is easier to maneuver than a single-screw vessel because the twin-screw vessel（）.

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

单项选择题A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a(n)（）.

A.forward spring line and going slow ahead on the inboard engine
B.after spring line and going slow astern on the outboard engine
C.forward spring line and going slow ahead on both engines
D.forward spring line and going slow ahead on the outboard engine

单项选择题A twin-screw ship going ahead on the starboard screw only tends to move（）.

A.in a straight line
B.to port
C.from side to side
D.to starboard

单项选择题A twin screw vessel，making headway with both engines turning ahead，will turn more readily to starboard if you（）.

A.reverse port engine，apply right rudder
B.reverse port engine，rudder amidships
C.reverse starboard engine，apply right rudder
D.reverse starboard engine，rudder amidships