A.Less signal energy is necessary for receiver operation
B.More signal energy is available at the receiver
C.It significantly increases the peak power
D.It increases the signal capacity
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A.Reflected electron
B.Electrical radiation
C.Quarterpoint electrical navigation
D.Hyperbolic radio navigation
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
最新試題
（）is not an alarm required by IMO standards to be available on the ECDIS.
Which of the following statements is TRUE regarding crane operations（）.
Would you please（）on the radar?
（）is a digitized“picture”of a chart.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
Radar makes the most accurate determination of the（）.
Would you mind（）your DF?
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.