A.dockmaster
B.dock captain
C.lockmaster
D.lock foreman
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A.speed begins to drop
B.stops
C.receives ice damage
D.becomes icebound
A.displaying code letter Y (Yankee)
B.sounding five short blasts on his whistle
C.displaying code numeral 5
D.sounding one prolonged blast on his whistle
A.remains fully obliged
B.has no obligation
C.is not necessarily
D.is exempted
A.diving operations
B.dredging
C.fishing
D.mineclearance operations
A.avoid collision
B.allow more time to assess the situation
C.be stopped in an appropriate distance
D.All of the above
最新試題
Before entering an ice area，the ship should be（）.
In selecting a tug for moving a vessel，consideration should be given to its（）.
On a single-screw vessel the stern frame（）.
When pushing ahead，wires leading from the quarters of the after outboard barges to the bow of a towboat（）.
In most cases，when a large merchant vessel enters shallow water at high speed the（）.
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（）.
If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.
A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.
A tug’s horsepower available at the shaft is（）.
Topside icing that blocks freeing ports and scuppers（）.