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
Which of the following statements is TRUE regarding crane operations（）.
The heading of a vessel is indicated by what part of the compass? （）
Loran-C is which type of system（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
Would you please（）on the radar?
To obtain accuracy in fixing by DF，（）and three stations should be used.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
（）is not a factor which will affect the accuracy of GPS receiver.
Loran-C uses the multiple pulse system because（）.