A.Skip zone
B.Blackout zone
C.Diffraction zone
D.Shadow zone
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A.provide safety-related information automatically to shore stations，other vessels and aircraft
B.receive safety-related information automatically from similarly equipped vessels
C.exchange safety-related information with shore-based facilities
D.All of the above
A.He space component
B.Control component
C.User component
D.Alarming component
A.Deviating from a planned route
B.Approach to waypoints and other critical points
C.Light house detecting
D.Larger scale chart available
A.detective Availability
B.local environmental conditions
C.autonomous mode versus differential correction mode versus RTCM mode
D.the averaging of recorded locations
A.Vector chart format
B.Raster chart data
C.pixel
D.Electronic Nautical Chart
最新試題
The heading of a vessel is indicated by what part of the compass? （）
The operation of which aids to navigation may be suspended during war or national emergency（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
Loran-C uses the multiple pulse system because（）.
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（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.