A.radar
B.omega
C.satellite navigator
D.DF
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你可能感興趣的試題
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
Loran-C uses the multiple pulse system because（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
When your vessel is proceeding to the area of traffic density，（）is used to determine the exact ranges of other ships or objects in the vicinity.
The loran lines drawn on navigation charts represent（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
Automatic identification systems（AIS）are required to（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
（）is a digitized“picture”of a chart.
Would you please（）on the radar?