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
In handling break bulk hazardous materials，it is forbidden to use（）.
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 icebreaker may use the code letter “K” to remind ships of their obligation to listen continuously on their radio. This signal may be made by any of the following EXCEPT（）.
An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.
All of the following vessels are “restricted in their ability to maneuver” EXCEPT a vessel （）.
Antiseptics are used principally to（）.
AMVER is a system which provides（）.
An advantage of the Christmas Tree towing method is to（）.
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? （）