A.detective Availability
B.local environmental conditions
C.autonomous mode versus differential correction mode versus RTCM mode
D.the averaging of recorded locations
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A.Vector chart format
B.Raster chart data
C.pixel
D.Electronic Nautical Chart
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
最新試題
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
The information received by AIS will be displayed on（）.
Would you please（）on the radar?
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
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.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Automatic identification systems（AIS）are required to（）.
What does not contribute to the commercial GPS receiver position error（）.
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（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.