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
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Berthing means bringing a vessel to her berth until（）.
Full details of all lights and fog signals are shown on（）.
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
When the wave period and the apparent rolling period are the same（）.
（）is where the crew eat their meals.
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
The loading of the ship must be done in accordance with（）.