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 operation of which aids to navigation may be suspended during war or national emergency（）.
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（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
Which one of the followings does not limit the effective range of radar（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
（）is a digitized“picture”of a chart.
（）is not a component of GPS.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
The heading of a vessel is indicated by what part of the compass? （）