A.bearing circle
B.pelorus
C.bearing bar
D.alidade
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A.spider element
B.sensitive element
C.link arm
D.pickup transformer
A.high or low
B.AC or DC
C.strong or weak
D.on or off
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
最新試題
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 receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
To obtain accuracy in fixing by DF，（）and three stations should be used.
Automatic identification systems（AIS）are required to（）.
The information received by AIS will be displayed on（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Would you please（）on the radar?
（）is a digitized“picture”of a chart.
Loran-C is which type of system（）.