A.laying a pipeline
B.dredging
C.mineclearing
D.not under command
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A.location
B.height of light above water
C.luminous range
D.light characteristics
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
最新試題
In handling break bulk hazardous materials，it is forbidden to use（）.
An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.
An engine compartment gasoline fire requires which type of extinguisher?（）
All of the following information concerning lighted aids to navigation may be read directly from the Light List EXCEPT the（）.
All of the following are part of the fire triangle EXCEPT（）.
Antiseptics are used principally to（）.
An example of an anchor which has a stock is a（）.
In respect of carrier’s liabilities，responsibilities，rights and immunities the（）contained in the International Convention for the Unification of Certain Rules Relating to Bills of Lading，signed at Brussels on August 25，1924，shall be applied.
Explosive and flammable gasses are most likely to be encountered on a vessel（）.
An anchored vessel is servicing an aid to navigation and is restricted in her ability to maneuver. Which lights will she show? （）