A.one engine ahead and one engine astern，with full rudder
B.one engine ahead and one engine astern，with rudders amidships
C.both engines ahead，with full rudder
D.both engines astern，with full rudder
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A.furnishes support to the rudder，propeller shaft，and transom frame
B.provides foundations for after mooring winches
C.provides foundations for the main propulsion engines
D.transfers the driving force of the propeller to the hull
A.indicated horsepower，bollard pull，and displacement
B.indicated horsepower，maneuverability，and displacement
C.indicated horsepower，bollard pull，and maneuverability
D.bollard pull，displacement，and maneuverability
A.apply enough rudder to counter the effect of the current
B.change your course to a zigzag course
C.reduce your speed
D.shift the weight to the stern
A.maneuverability will increase
B.speed will increase
C.bow will squat farther than the stern
D.vessel will rise slightly，on a level plane
A.The towing line between the two vessels should be clear of the water
B.The towing line should be taut at all times between the vessels
C.There should be a catenary so the line dips into the water
D.None of the above
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A vessel proceeding along the course of a narrow channel shall keep as near to the outer limitof the channel which lies on her starboard side as it is safe and practicable.Which one of the followings does the statement express?（）.
A tug’s horsepower available at the shaft is（）.
A vessel which is being assisted by an icebreaker would display a flag hoist consisting of the code numeral 4 when the vessel（）.
Two vessels are abreast of each other and passing port to port in a confined waterway. What should you expect as your bow approaches the screws of the other vessel? （）
If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.
A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.
Topside icing decreases vessel stability becauseit increases（）.
An alternating light（）.
When operating in an area where sea ice and icebergs are present，which statement is TRUE? （）
For operations in pack ice，a vessel should（）.