A.air gap
B.freeboard
C.penetration
D.water depth
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A.range of tide
B.height of tide
C.charted depth
D.actual water depth
A.difference in longitude
B.mid-longitude
C.departure
D.meridian angle
A.increases in north latitude and decreases in south latitude
B.decreases as DLO increases
C.increases with increased latitude
D.decreases with increased latitude
A.set the vessel to the left
B.set the vessel to the right
C.offer resistance in the form of a head current
D.furnish additional thrust in the form of a fair or following current
A.Canary Current
B.Benguela Current
C.Agulhas Current
D.South Atlantic Current
最新試題
The height of a light is measured from which reference plane?（）
The period at high or low tide during which there is no change in the height of the water is called the （）.
Clearance gauges at bridges indicate （）.
AFTER DROPPING THE PILOT means （）.
Attention is called to the fact that in many cases charted depths may be decreased by up to （）.
The Earth’s irregular heating is caused by （）.
An occulting light is one in which （）.
The distance between any two meridians measured along a parallel of latitude （）.
On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
On a voyage from Halifax,N.S.,to Dakar,West Africa,the Canary Current will （）.