A.Focus line
B.Base line
C.Side line
D.Center line
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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
A.Less signal energy is necessary for receiver operation
B.More signal energy is available at the receiver
C.It significantly increases the peak power
D.It increases the signal capacity
最新試題
Which one of the followings does not limit the effective range of radar（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
（）is not a component of GPS.
The loran lines drawn on navigation charts represent（）.
Automatic identification systems（AIS）are required to（）.
Would you mind（）your DF?
In using Loran-C，skywave reception gives greater range but is（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Would you please（）on the radar?