A.fuel
B.electricity
C.oxygen
D.heat
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A.every station in one chain to transmit at the same time
B.each station to transmit without reference to another station
C.on-line transmission of single-line transmitters at the same time
D.each station to only depend on the master for synchronization and signal ratio
A.the rotation of the earth on its axis
B.convection currents caused by differences in radiant heating between equatorial and polar regions
C.mountain ranges
D.All of the above
A.the letters ICW after the aid's number or letter
B.yellow stripes，squares，or triangles marked on them
C.white retroreflective material
D.the light characteristic and color for lighted aids
A.Bayou Sara
B.Baton Rouge
C.Head of Passes
D.Red River Landing
A.Thimble Shoal Main Channel or the South Auxiliary Channel
B.Any of the channels but keep to the right hand side
C.The South Auxiliary Channel
D.Thimble Shoal Main Channel
最新試題
An aneroid barometer on a boat should always be（）.
An inflatable liferaft is floating in its container，attached to the ship by its painter，as the ship is sinking rapidly. Which action should be taken with respect to the liferaft container? （）
Air circulation is caused or affected by（）.
An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.
An all-round flashing yellow light may be exhibited by a(n)（）.
An azimuth angle for a body is measured from the（）.
An example of a grade B product is（）.
All of the following information concerning lighted aids to navigation may be read directly from the Light List EXCEPT the（）.
An engine compartment gasoline fire requires which type of extinguisher?（）
AMVER is a system which provides（）.