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
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
Automatic identification systems（AIS）are required to（）.
In using Loran-C，skywave reception gives greater range but is（）.
The information received by AIS will be displayed on（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
The loran lines drawn on navigation charts represent（）.
Would you mind（）your DF?
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Which of the following statements is TRUE regarding crane operations（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.