A vessel towing astern in an operation which severely restricts the towing vessel and her tow in their ability to change course shall，when making way，exhibit（）.

单项选择题A vessel is equipped with a single right-handed screw. With rudder amidships and calm wind，the vessel will most likely back（）.

A.straight astern
B.to port
C.to starboard
D.in no particular direction

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

A.at anchor
B.mine-clearing
C.engaged in fishing
D.engaged in towing

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