Dan,

On Mon, 19 Mar 2007 13:47:00 +0000, Dan Smith wrote:

> On 19/03/07, wouter van ooijen <wouter@voti.nl> wrote:
> > It wasn't RDS, it was some format the airplaines or air traffic control
> > uses. I don't have any pointers, in fact I forgot the format's name.
> 
> ACARS maybe?
> 
> <http://en.wikipedia.org/wiki/ACARS>

That's between the airline and its aircraft, not involving air traffic control.  If it was related to the latter, it could have been a transponder.

Cheers,


Howard Winter
St.Albans, England


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