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
Which statement concerning GPS is TRUE（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
The loran lines drawn on navigation charts represent（）.
（）is not a factor which will affect the accuracy of GPS receiver.
The information received by AIS will be displayed on（）.