A.two stations，including one on the nearest coast
B.two stations，including one on the nearer coast
C.three stations，including one on the farthest coast
D.three stations，including one on the nearest coast
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A.parallel bearings
B.long-range bearings
C.short-range bearings
D.cross bearings
A.their transmitters
B.their receivers
C.their radars
D.their lorans
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
While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.
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 time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
Would you please（）on the radar?
The operation of which aids to navigation may be suspended during war or national emergency（）.
Which of the following statements is TRUE regarding crane operations（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
Which one of the followings does not limit the effective range of radar（）.