A.gyro-compass
B.marine radar
C.DF
D.navigational satellite
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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
A.radar
B.omega
C.satellite navigator
D.DF
最新試題
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
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（）.
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（）.
The information received by AIS will be displayed on（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Which statement concerning GPS is TRUE（）.
（）is not a component of GPS.