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
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
In using Loran-C，skywave reception gives greater range but is（）.
（）is a digitized“picture”of a chart.
Automatic identification systems（AIS）are required to（）.
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（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
Would you mind（）your DF?
Would you please（）on the radar?
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.