Gig,

I beleive that is your MODE S code. I'm surprised they didn't enter it when
they installed the 330. You so a really easy way to find out what the number
is don't you?


Nope, very important difference. Your aircraft is assigned a hex code which
should be entered by the installing agency only and shouldn't be changed by the
user. However, the S mode data packet also contains one more data field with
either one of two informations: Either the aircraft registration or the flight
number. Obviously, for us lowly GA pilots, we want the aircraft registration in
there and we don't need to change it. It is entered without any dashes some
countries might have in there (e.g. in Germany all registrations start with
D-), so you enter it just like on a flight plan form.

However, if the GTX330 is installed in an airline aircraft, the crew is
supposed to enter the flight number (e.g. UA078) before each flight. You can
set in the set-up menu whether the GTX330 should ask for a flight number every
time after switching it on or not.

--
Thomas Borchert (EDDH)