A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
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A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water
A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
A.has left hand twist
B.has inside threads on both ends
C.has outside threads on both ends
D.takes two men to operate
A.dead reckoning
B.pilotage
C.great circle sailing
D.geographic navigation
A.blows the fire back toward the vessel
B.comes over the bow
C.comes over the stern
D.comes over either beam
最新試題
Before any loading takes place any signs of the previous cargo should do（）.
ECDIS must be able to perform all of the following EXCEPT（）.
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
It is dangerous for vessels without the operational radar（）the estuary.
A tide is called diurnal when（）.
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
Which of the following is not a form of precipitation?（）
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
What is it called when it is possible to ignite the vapour above the oil?（）
Full details of all lights and fog signals are shown on（）.