A.if
B.how
C.when
D.where
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A.radar
B.omega
C.satellite navigator
D.DF
A.While a fix can be generated by signals received from two satellites，three satellites are necessary for reliable accuracy
B.The satellites are in equatorial orbits around the earth about 60°of longitude apart
C.The satellite navigation system determines a fix by measuring the doppler shift of the radio signals from the satellite
D.The ship's receiver cannot begin processing data until the antenna locks onto the satellite and starts continuous tracking
最新試題
（）is not a factor which will affect the accuracy of GPS receiver.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
Would you please（）on the radar?
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Loran-C is which type of system（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．