A.location
B.height of light above water
C.luminous range
D.light characteristics
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A.fuel
B.electricity
C.oxygen
D.heat
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
最新試題
Aids to navigation marking the intracoastal waterway can be identified by（）.
All personnel on board a vessel should be familiar with the rescue boat’s（）.
An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.
Antiseptics are used principally to（）.
An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.
An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.
AMVER is a system which provides（）.
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? （）
In handling break bulk hazardous materials，it is forbidden to use（）.
All towing vessels of 26 feet or longer while navigating are required to carry which item? （）