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
The operation of which aids to navigation may be suspended during war or national emergency（）.
The loran lines drawn on navigation charts represent（）.
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.
（）is not a factor which will affect the accuracy of GPS receiver.
The line connecting the Loran-C master station with a secondary station is called the（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
（）is a digitized“picture”of a chart.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.