A.their transmitters
B.their receivers
C.their radars
D.their lorans
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A.if
B.how
C.when
D.where
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 component of GPS.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The loran lines drawn on navigation charts represent（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
The heading of a vessel is indicated by what part of the compass? （）
Which statement concerning GPS is TRUE（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Automatic identification systems（AIS）are required to（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.