A.Navigational satellites
B.Loran
C.Omega
D.Any of the above
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A.Ground waves
B.Skywaves
C.Either ground waves or skywaves interchangeably
D.An average between ground wave and skywave positions
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
最新試題
The loran lines drawn on navigation charts represent（）.
（）is not a factor which will affect the accuracy of GPS receiver.
The（）transmits own ship data cyclically via two defined VHF channels and receives the same data of the other ships and objects that are equipped with AIS systems.
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 operation of which aids to navigation may be suspended during war or national emergency（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
Would you mind（）your DF?
Which statement concerning GPS is TRUE（）.
Loran-C is which type of system（）.