A.directional current
B.forward current
C.propeller current
D.wake current
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A.Shift weight to the bow
B.Shift weight to the center of the boat
C.Shift weight to the stern
D.Throw excess weight overboard
A.Port
B.Commercial area
C.Berth
D.Roadstead
A.is ready to use but vessels must stand clear
B.is ready to use and vessels may approach
C.cannot be made ready immediately and vessels shall stand clear
D.cannot be made ready immediately but vessels may approach
A.ready for entrance
B.ready for entrance，but gates cannot be closed completely
C.being made ready for entrance
D.not ready for entrance
A.enter the pack on the windward side where there is a well defined ice edge
B.trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcement
C.take maximum advantage of coastal leads caused by offshore winds
D.look for areas of rotten ice and enter perpendicular to the ice edge
最新試題
When pushing ahead，wires leading from the quarters of the after outboard barges to the bow of a towboat（）.
If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.
A vessel reduces speed without backing. The rate that her speed through the water decreases depends primarily on the（）.
As the weather was worsening and wind force rising to 8，my vessel（）were yawing within forty degrees of the compass.
A vessel proceeding along the bank of a river or channel has the tendency to（）.
On a single-screw vessel the stern frame（）.
A tug’s horsepower available at the shaft is（）.
A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way? （）
A vessel shall slacken her speed，stop，or reverse her engines，if necessary，to（）.
In selecting a tug for moving a vessel，consideration should be given to its（）.