majoco
Stirrer
The problem with HF is that although the Controller may be able to contact aircraft "A" and aircraft "B", "A" might not be able to hear "B"and vice versa - just another one of the funnies of HF propagation.
AM or FM, Question, Please
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novascotian
Member
When I was in naval comms many decades ago, I was told that because FM is frequency modulation, there is some kind of influence by the Doppler Effect on transmissions due to the high speed movement of aircraft, and this is not a factor in AM. And of course not found with stationary or relatively slow moving land or ship mobiles.
Also, re the 380 to 400 MHz sub-band, I am under the impression that that is a US sub-band and that internationally 380-400 is no different than the rest of the 225-400 band.
Also, re the 380 to 400 MHz sub-band, I am under the impression that that is a US sub-band and that internationally 380-400 is no different than the rest of the 225-400 band.
novascotian
Member
Regarding the SURRY CG, I don't think CG has anything at all to do with Coast Guard, certainly not USCG, as it is not within their jurisdictional area. Here is a chart that is a bit outdated, of the adjoining Moncton ACC area, showing some of Gander's sectors to the right. You will see that they all have two letter designations. Some of them, maybe all, have some connection between places on the ground, or waypoints. For example QY is in the area of Sydney, NS (CYQY and VOR YQY). See how GO is near waypoint GOLFE.
SURRY is likely a waypoint name, perhaps no longer in use, and CG probably relates to some ground feature or another waypoint.
SURRY is likely a waypoint name, perhaps no longer in use, and CG probably relates to some ground feature or another waypoint.- Status
