A.Ground waves
B.Skywaves
C.Either ground waves or skywaves interchangeably
D.An average between ground wave and skywave positions
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A.Focus line
B.Base line
C.Side line
D.Center line
A.DCU
B.UTC
C.ENC
D.MENU
A.AIS
B.ECDIS
C.GPS
D.VDR
A.direction of a target
B.distance to a target
C.size of a target
D.shape of a target
A.Bell alarm to warn the user
B.Lighted alarm signal to warn the user
C.Alternate signal keying system
D.View finder for each station
最新試題
The information received by AIS will be displayed on（）.
Would you please（）on the radar?
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
Loran-C is which type of system（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
（）is a digitized“picture”of a chart.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
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）（）.
（）is not a factor which will affect the accuracy of GPS receiver.