A.spider element
B.sensitive element
C.link arm
D.pickup transformer
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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
A.their transmitters
B.their receivers
C.their radars
D.their lorans
最新試題
Would you please（）on the radar?
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
Radar makes the most accurate determination of the（）.
In using Loran-C，skywave reception gives greater range but is（）.
If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.
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（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
What does not contribute to the commercial GPS receiver position error（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.