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 information received by AIS will be displayed on（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
（）is a digitized“picture”of a chart.
The loran lines drawn on navigation charts represent（）.
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（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
In using Loran-C，skywave reception gives greater range but is（）.
Would you mind（）your DF?