A.AIS
B.ECDIS
C.GPS
D.VDR
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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
A.Reflected electron
B.Electrical radiation
C.Quarterpoint electrical navigation
D.Hyperbolic radio navigation
A.only accurate during daylight hours
B.much less accurate
C.only accurate at twilight
D.more accurate than using ground waves
最新試題
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
When your vessel is proceeding to the area of traffic density，（）is used to determine the exact ranges of other ships or objects in the vicinity.
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 expected to be broadcast every 1 to 10 seconds（）.
Radar makes the most accurate determination of 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（）.
Automatic identification systems（AIS）are required to（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.