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 a digitized“picture”of a chart.
You are about to go to sea and adjust the magnetic compass．To expedite the adjustment at sea，in what order should the following dockside adjustments be made（）.
Which statement concerning GPS is TRUE（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
What does not contribute to the commercial GPS receiver position error（）.
The information received by AIS will be displayed on（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
Which of the following statements is TRUE regarding crane operations（）.
The heading of a vessel is indicated by what part of the compass? （）