A.Parallel bearings
B.Long-range bearings
C.Short-range bearings
D.Cross bearings
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A.High frequency pulses
B.Combinations of high and low frequency pulses
C.The same frequency for all stations in a chain
D.Varied long and short pulses
A.An atomic time standard
B.Daylight Savings Time
C.Eastern Standard Time
D.Greenwich Mean Time
A.one
B.two
C.three
D.four
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
最新試題
The loran lines drawn on navigation charts represent（）.
The information received by AIS will be displayed on（）.
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.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Which statement concerning GPS is TRUE（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
（）is a digitized“picture”of a chart.