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
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
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（）.
（）is not a factor which will affect the accuracy of GPS receiver.
What does not contribute to the commercial GPS receiver position error（）.
The information received by AIS will be displayed on（）.
（）is a digitized“picture”of a chart.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
The line connecting the Loran-C master station with a secondary station is called the（）.