A.one
B.two
C.three
D.four
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A.Mate's license
B.Restricted radiotelephone operator permit
C.Second-class radio operator's license
D.Seaman's document
A.Navigational satellites
B.Loran
C.Omega
D.Any of the above
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
最新試題
Would you please（）on the radar?
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
In using Loran-C，skywave reception gives greater range but is（）.
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.
Which of the following statements is TRUE regarding crane operations（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
（）is a digitized“picture”of a chart.
（）is not a factor which will affect the accuracy of GPS receiver.
While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.
What does not contribute to the commercial GPS receiver position error（）.