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
An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.
An advantage of the Christmas Tree towing method is to（）.
An aneroid barometer on a boat should always be（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
An “atoll cloud” forming over an island due to heating of the land during the daytime would be which type? （）
An “on-load” release system on a survival craft means the cable can be released（）.
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? （）
Explosive and flammable gasses are most likely to be encountered on a vessel（）.
All of the following are part of the fire triangle EXCEPT（）.
An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes? （）