A.be on an even keel
B.be trimmed slightly by the head
C.have a drag of not more than 60 - 90 centimeters
D.be ballasted so the forefoot is near the surface
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A.either trimmed by the head or the stern
B.on an even keel
C.trimmed down by the head
D.trimmed down by the stern
A.anchor
B.to anchor
C.anchoring
D.to anchoring
A.shows a light with varying lengths of the lighted period
B.shows a light that changes color
C.marks an alternate lesser-used channel
D.is used as a replacement for another light
A.dockmaster
B.dock captain
C.lockmaster
D.lock foreman
A.speed begins to drop
B.stops
C.receives ice damage
D.becomes icebound
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In selecting a tug for moving a vessel，consideration should be given to its（）.
Before entering an ice area，the ship should be（）.
A tug’s horsepower available at the shaft is（）.
On a twin-screw，twin-rudder vessel，the most effective way to turn in your own water，with no way on，is to put（）.
In most cases，when a large merchant vessel enters shallow water at high speed the（）.
All persons or vessels within the lock area，including the lock approach channels，come under the authority of the（）.
Small floes of rough，hummocky sea ice capable of damaging a vessel（）.
Topside icing decreases vessel stability because it is usually off-center and（）.
A vessel showing a rigid replica of the International Code flag A is engaged in（）.
The proximity of pack ice may be indicated by（）.