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
AMVER is a system which provides（）.
An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.
Explosive and flammable gasses are most likely to be encountered on a vessel（）.
An icebreaker displaying a flag hoist which consists of the code letters “WO” (Whiskey Oscar) is indicating that（）.
Aids to navigation marking the intracoastal waterway can be identified by（）.
An “atoll cloud” forming over an island due to heating of the land during the daytime would be which type? （）
An all-round flashing yellow light may be exhibited by a(n)（）.
An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.
All towing vessels of 26 feet or longer while navigating are required to carry which item? （）
An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.