A.only accurate during daylight hours
B.much less accurate
C.only accurate at twilight
D.more accurate than using ground waves
您可能感興趣的試卷
你可能感興趣的試題
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
A.detective Availability
B.local environmental conditions
C.autonomous mode versus differential correction mode versus RTCM mode
D.the averaging of recorded locations
最新試題
Most modern Loran-C receivers,when not tracking properly,have a(n)().
Radar makes the most accurate determination of the().
()is a digitized“picture”of a chart.
When your vessel is proceeding to the area of traffic density,()is used to determine the exact ranges of other ships or objects in the vicinity.
The operation of which aids to navigation may be suspended during war or national emergency().
To obtain accuracy in fixing by DF,()and three stations should be used.
Which of the following statements is TRUE regarding crane operations().
With respect to automatic identification systems(AIS),which information is expected to be broadcast every 1 to 10 seconds().
The()transmits own ship data cyclically via two defined VHF channels and receives the same data of the other ships and objects that are equipped with AIS systems.
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().