8918 New York

[Saint]

21 :10 UTC 8.918 mhz Major World Air Route Call In, conditions for listening are great at this time, very strong signal comming in from the aircraft too.
Steve

 

[SCPD]

22:25 UTC 8918 Got them very strong on my end also. I guess it helps that im in NY

I'm also hearing data bursts

 

[majoco]

Anyone know where the transmitter is? I suspect from the coverage map it's in Miami as that appears to be about in the centre. I hear the occasional call late afternoon here (0400-0600z) but after that - nothing. I suspect they may have a change to a lower frequency about 0600z. 8846 is published as the primary, but I don't hear anything there.

Regards - Marty ZL2MC

 

[ka3jjz]

If you listen carefully to each check in, the announcer will eventually say 'your call check is (or your selcall check is) (followed by a 4 character string read phonetically)' or something very similar. This is a selcall for the aircraft...

SELCAL - Wikipedia, the free encyclopedia

73 Mike

 

[CLynch7]

Anyone know where the transmitter is? I suspect from the coverage map it's in Miami as that appears to be about in the centre. I hear the occasional call late afternoon here (0400-0600z) but after that - nothing. I suspect they may have a change to a lower frequency about 0600z. 8846 is published as the primary, but I don't hear anything there.

Regards - Marty ZL2MC

Pretty sure it at the Sackville relay site, I'm almost sure that is where the NY/Calgary/Trenton volmets are broadcast from.

 

[majoco]

Selcal code (such as "Bravo Golf Charlie Hotel") is a code allocated to every aircraft with HF fitted. It does not change, the ground controller does not tell the aircraft what code to use. Up to about 1980 the eight musical tones A to G were sufficient, but now they go right up to S or domething. The early equipment used vibrating reeds to detect each tone as in a harmonica, now of course it's all digital.

The ground controller may say "Squawk 3456" which is the ATC transponder setting for the pilot so that the controller can identify each aircraft on his secondary radar display.