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
In using Loran-C，skywave reception gives greater range but is（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
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（）.
Loran-C uses the multiple pulse system because（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
Which one of the followings does not limit the effective range of radar（）.
Would you please（）on the radar?
Would you mind（）your DF?
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.