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
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
（）is not a component of GPS.
The loran lines drawn on navigation charts represent（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
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（）.
（）is not a factor which will affect the accuracy of GPS receiver.
The heading of a vessel is indicated by what part of the compass? （）
You are about to go to sea and adjust the magnetic compass．To expedite the adjustment at sea，in what order should the following dockside adjustments be made（）.