A.indicated horsepower
B.brake horsepower
C.dynamic horsepower
D.net horsepower
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A.tow strain
B.catenary length
C.being in step
D.Williamson's Tow
A.At the head of the tow
B.75m from the head of the tow
C.120m from the head of the tow
D.180m from the head of the tow
A.yaw
B.surge
C.sway
D.swing
A.only one high and one low water occur during a lunar day
B.the high tide is higher and the low tide is lower than usual
C.the high tide and low tide are exactly six hours apart
D.two high tides occur during a lunar day
A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay
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A vessel proceeding along a narrow channel shall（）.
On a single-screw vessel the stern frame（）.
Small floes of rough，hummocky sea ice capable of damaging a vessel（）.
The proximity of pack ice may be indicated by（）.
A vessel proceeding along the course of a narrow channel or fairway shall keep as near to the （）limit of the channel or fairway which lies on her（）side as is safe and practicable.
When operating in an area where sea ice and icebergs are present，which statement is TRUE? （）
All persons or vessels within the lock area，including the lock approach channels，come under the authority of the（）.
A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.
On a twin-screw，twin-rudder vessel，the most effective way to turn in your own water，with no way on，is to put（）.
A vessel proceeding along the bank of a river or channel has the tendency to（）.