A.inconspicuous
B.conspicuous
C.a government facility or station
D.a radio transmitter
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A.coast to aircraft operational communications
B.aircraft to ship operational communications
C.lock & bridge communications
D.aircraft to ship navigational communications
A.without losing the rhythm of respiration
B.only with the help of two other people
C.by not stopping the respiration for more than 5 minutes
D.at ten minute intervals
A.It causes minimal damage
B.It is safer for personnel
C.It is cheaper
D.It is most effective on a per unit basis
A.Grade A flammable liquid
B.Grade C flammable liquid
C.Grade D combustible liquid
D.Grade E combustible liquid
A.six months
B.one year
C.two years
D.thirty months
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Clouds form（）.
Cyclones that have warm sectors usually move（）.
Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.
Considering the general circulation of the atmosphere，the wind system between latitudes 30°N and 60°N is commonly called the（）.
Denebola is found in what constellation?（）
Deck beams on a ship are generally spaced at equal intervals and run（）.
Control of fire should be addressed（）.
Chart legends printed in capital letters show that the associated landmark is（）.
Charts showing the coast of Mexico are produced by the United States（）.
Compliance with the terms of the load line certificate on a ship is the responsibility of the（）.