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
Automatic identification systems（AIS）are required to（）.
Would you mind（）your DF?
To obtain accuracy in fixing by DF，（）and three stations should be used.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
（）is not a component of GPS.
（）is not an alarm required by IMO standards to be available on the ECDIS.
Which one of the followings does not limit the effective range of radar（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
The heading of a vessel is indicated by what part of the compass? （）