A.The marine sextant
B.The chronometer
C.The echo sounder
D.The radar
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A.are tracked on reciprocal bearings
B.are tracked at the same range
C.are tracked on the same bearing
D.pass closely to each other
A.the vapor and air mixture is too rich
B.it is mixed with certain proportions of air
C.the vapor is too little compared to the air
D.it is of heavy toxicity
A.manifold
B.remote pull box
C.discharge nozzle
D.machinery space
A.AIS
B.SSAS
C.SSP
D.SART
A.Maintain balance and move with agility
B.Climb up and down vertical ladders and stairways
C.Open and close watertight doors
D.Take part in vessel evacuation procedures
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When the wave period and the apparent rolling period are the same（）.
The circulation around a low pressure center in the Northern Hemisphere is（）.
The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
Before any loading takes place any signs of the previous cargo should do（）.
The loading of the ship must be done in accordance with（）.
Which of the following is not an operation mode of AIS?（）
The dew point temperature is（）.
ECDIS must be able to perform all of the following EXCEPT（）.
（）is where the crew eat their meals.
According to the relevant regulation, lifeboat should be powered by（）.