A.radio time signal
B.comparison with a timepiece of known error
C.applying the prevailing chronometer rate to previous readings
D.All of the above
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A.National Geospatial-Intelligence Agency
B.Coast Guard
C.Naval Observatory
D.National Ocean Service
A.underlined letters
B.capital letters
C.italics
D.boldface print
A.inconspicuous
B.conspicuous
C.a government facility or station
D.a radio transmitter
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
最新試題
Deck beams on a ship are generally spaced at equal intervals and run（）.
Control of fire should be addressed（）.
Deficient oxygen content inside a chain locker can be detected with（）.
Compared to a low pressure system，generally the air in a high is（）.
Corrosive liquids and acids should have which kind of label?（）
Consideration should be given in planning for the mooring orientation in a new location so that in adverse weather a crane is available to off-load the supply vessel on what side of the unit?（）
Coast Pilots and navigational charts are kept corrected and up-to-date by using the（）.
Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.
Day-shapes must be displayed（）.
Cyclones that have warm sectors usually move（）.