A.displacement
B.free surface
C.draft
D.KG
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A.increases displacement
B.increases the height of the center of gravity
C.increases draft
D.reduces the pocketing of free surface
A.changes in seawater salinity
B.glare on clouds on the horizon
C.changes in air temperature
D.icebergs
A.can usually be detected by radar in a smooth sea at a range of 4 to 6 kilometers
B.are indistinguishable from sea return on the PPI
C.are invisible to radar when covered with a thick layer of snow
D.are usually seen at night before they are close enough to provide a radar echo
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
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
最新試題
Topside icing decreases vessel stability because it is usually off-center and（）.
A vessel proceeding along the bank of a river or channel has the tendency to（）.
The proximity of pack ice may be indicated by（）.
An alternating light（）.
Before entering an ice area，the ship should be（）.
All persons or vessels within the lock area，including the lock approach channels，come under the authority of the（）.
When operating in an area where sea ice and icebergs are present，which statement is TRUE? （）
Topside icing that blocks freeing ports and scuppers（）.
As the weather was worsening and wind force rising to 8，my vessel（）were yawing within forty degrees of the compass.
A vessel the passage of which is not to be impeded（）to comply with this Rule when the two vessels are approaching one another so as to involve risk of collision.