A.Mate's license
B.Restricted radiotelephone operator permit
C.Second-class radio operator's license
D.Seaman's document
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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
A.AIS
B.ECDIS
C.GPS
D.VDR
最新試題
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
The heading of a vessel is indicated by what part of the compass? （）
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.
Which of the following statements is TRUE regarding crane operations（）.
Would you please（）on the radar?
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.