A.high or low
B.AC or DC
C.strong or weak
D.on or off
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A.gyro-compass
B.marine radar
C.DF
D.navigational satellite
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
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
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（）.
Would you please（）on the radar?
（）is not a factor which will affect the accuracy of GPS receiver.
The operation of which aids to navigation may be suspended during war or national emergency（）.
In using Loran-C，skywave reception gives greater range but is（）.
Loran-C is which type of system（）.
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.
Which one of the followings does not limit the effective range of radar（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
Loran-C uses the multiple pulse system because（）.