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
（）is where the crew eat their meals.
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
In the Northern hemisphere northerly winds may cause temperature（）.
Which of the following is not a form of precipitation?（）
Which of the following shall not the officers in charge of the navigational watch do?（）
What is a CORRECT reply to a pilot’s request, How’s your heading?（）
The helm command PORT TWENTY means（）.
（）is on the panel of radar.
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.