A.hydrography
B.aids to navigation
C.tidal currents
D.regulatory boundaries
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A.Bending moment
B.local strength
C.shear force
D.displacement
A.foul of anchor
B.dropping anchor
C.weighing anchor
D.walking back anchor
A.The marine sextant
B.The chronometer
C.The echo sounder
D.The radar
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
最新試題
The circulation around a low pressure center in the Northern Hemisphere is（）.
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
Berthing means bringing a vessel to her berth until（）.
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
Shipboard Emergency Drills must be carried out at least（）on board cargo ship.
The loading of the ship must be done in accordance with（）.
Bales close to the deckhead should be covered to prevent（）.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.