A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
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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
A.cooling the outside bulkheads with water
B.shutting all sources of air into the compartment
C.closing the sea chest
D.flooding the compartment with salt water
A.contaminating food with extinguishing agent
B.shutting all sources of air into the compartment
C.closing the sea chest
D.a grease fire in the ventilation system
最新試題
It is dangerous for vessels without the operational radar（）the estuary.
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
In the Northern hemisphere northerly winds may cause temperature（）.
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
Which of the following is not an operation mode of AIS?（）
The circulation around a low pressure center in the Northern Hemisphere is（）.
Where would you find information about the time of high tide at a specific location on a particular day of the year?（）
Bales close to the deckhead should be covered to prevent（）.
The loading of the ship must be done in accordance with（）.
Which of the following shall not the officers in charge of the navigational watch do?（）