A.10 meters
B.20 meters
C.50 meters
D.100 meters
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A.Satellite clock
B.Ship's speed
C.Atmospheric/ionospheric propagation
D.Receiver
A.Parallel bearings
B.Long-range bearings
C.Short-range bearings
D.Cross bearings
A.High frequency pulses
B.Combinations of high and low frequency pulses
C.The same frequency for all stations in a chain
D.Varied long and short pulses
A.An atomic time standard
B.Daylight Savings Time
C.Eastern Standard Time
D.Greenwich Mean Time
A.one
B.two
C.three
D.four
最新試題
The heading of a vessel is indicated by what part of the compass? （）
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
Radar makes the most accurate determination of the（）.
Which of the following statements is TRUE regarding crane operations（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
The（）transmits own ship data cyclically via two defined VHF channels and receives the same data of the other ships and objects that are equipped with AIS systems.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
In using Loran-C，skywave reception gives greater range but is（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.