A.Vector chart format
B.Raster chart data
C.pixel
D.Electronic Nautical Chart
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A.Card
B.Needle
C.Lubber's line
D.Gimbals
A.on loran charts covering areas where sky waves are used
B.in the Radio Aids to Navigation，PUB 117
C.in the Loran-C Correction Tables
D.Sky waves cannot be matched to ground waves in LORAN-C to produce a usable reading
A.full confirmation
B.precise appreciation
C.immediate assessment
D.timely recognition
A.direction of a target
B.distance to a target
C.size of a target
D.shape of a target
A.brightness of objects
B.color of targets
C.shape of targets
D.bearing of objects
最新試題
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
Loran-C is which type of system（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
Would you please（）on the radar?
（）is not a component of GPS.
Radar makes the most accurate determination of the（）.
Loran-C uses the multiple pulse system because（）.