A.Reflected electron
B.Electrical radiation
C.Quarterpoint electrical navigation
D.Hyperbolic radio navigation
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A.only accurate during daylight hours
B.much less accurate
C.only accurate at twilight
D.more accurate than using ground waves
A.Skip zone
B.Blackout zone
C.Diffraction zone
D.Shadow zone
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
最新試題
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
The information received by AIS will be displayed on（）.
Loran-C is which type of system（）.
Which of the following statements is TRUE regarding crane operations（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
Radar makes the most accurate determination of the（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
（）is not a factor which will affect the accuracy of GPS receiver.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Which one of the followings does not limit the effective range of radar（）.