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
Would you mind（）your DF?
In using Loran-C，skywave reception gives greater range but is（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
Which statement concerning GPS is TRUE（）.
What does not contribute to the commercial GPS receiver position error（）.
（）is not a factor which will affect the accuracy of GPS receiver.
（）is not a component of GPS.
If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
Which of the following statements is TRUE regarding crane operations（）.