Hi Robert,

The HF (shortwave) band has several allocation ranges dedicated to aircraft
communications. These are voice comms from en-route aircraft to ground
stations.

There are MWARA (Major World Air Route Area) frequencies and RDARA (Regional
and Domestic Air Route Area) frequencies. There's also AOC (Airline
Operational Control) (also known as LDOC - Long Distance Operational
Control) frequencies which are used by aircraft to communicate with their
own companies (for example, you may hear an aircraft speak with their own
maintenance department regarding an engineering problem.)

LDOC stuff is usually in the native language of the pilots and airline. The
convention in aviation is to speak English and this is usually the case
(although, for example, you can hear Spanish being spoken between
controllers and aircraft on 8906 kHz, Canarias Radio in the Canary Islands.
They switch back to English shortly thereafter).

I've been hearing activity from "Tripoli Radio" which is a ground station in
Tripoli, Libya, on 11300 kHz, USB. This station forms part of the Africa
MWARA and is abbreviated as "AFI". You can also hear Khartoum in Sudan, and
Cairo in Egypt on this frequency (and a couple of others).

You can use Google to hunt down lots more frequencies.

Here is a list of allocated aviation HF frequencies:
http://www.kloth.net/informations/ams-1983.htm
Also:
http://www.phreak.org/archives/The_H...adio1/aero.ssb
and http://rodolfo.ips.es/HTML/06radio/B...s/AEROLIST.TXT
and http://www.flightradio.com/hf.htm
and http://www.mwcs.co.uk/shortwave/Aero_freqs.htm

You get the idea!

Mark.





"Robert11" wrote in message
...
Hi,

New at this.

Saw a reference to an "AFI Net", in receiving some signals from Tripoli.

What is this, please ?

Bob