ren41
Posts: 1456
Joined: Mon Jan 08, 2001 3:24 am

Differing Flight Numbers Between Timetable/ATC?

Fri Aug 31, 2007 11:08 am

I've been listening to ATC a lot lately and have noticed many flight numbers which differ from those listed on timetables. These are some I can think of off the top of my head:

Timetable / ATC
BAW213 > BAW71G
BAW215 > BAW51G
GSM735 > GSM7GB
SWR15R, etc.

I admittedly do not know much about ATC and was wondering the reasoning behind the "odd" callsigns.

Thanks,
R41
 
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JBo
Posts: 1610
Joined: Wed Jan 05, 2005 7:23 am

RE: Differing Flight Numbers Between Timetable/ATC?

Fri Aug 31, 2007 11:14 am

Sometimes it has to do with different aircraft operating under the same flight number .... say BAW213 is a 757 on one leg, then becomes a 767 on the next. If that 767 flight takes off before the incoming flight, it'll depart with a different callsign so the two flights are not confused.

Also, many regional airlines ... at least in the U.S. ... will operate under a different flight number than what's printed in the timetable. i.e., American Eagle flight 4140 will operate on ATC as EGF140 ("Eagle Flight 140"). This may be done for simplicity, but in the case of operators who may operate similar flight ranges for different carriers, avoid confusion on different flight legs.
I'd take the awe of understanding over the awe of ignorance any day.
 
B777ER
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RE: Differing Flight Numbers Between Timetable/ATC?

Fri Aug 31, 2007 1:47 pm

No, I think it has to do with some new Euro deal where callsigns are easliy mis-pronounced or sound alike so they added a letter to the number in the end of the callsign.
 
ren41
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Joined: Mon Jan 08, 2001 3:24 am

RE: Differing Flight Numbers Between Timetable/ATC?

Sat Sep 01, 2007 3:36 am

Quoting B777ER (Reply 2):
No, I think it has to do with some new Euro deal where callsigns are easliy mis-pronounced or sound alike so they added a letter to the number in the end of the callsign.

Thanks, that seems about right as it seems to affect only a handful of European carriers.

R41
 
Viscount724
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RE: Differing Flight Numbers Between Timetable/ATC?

Sat Sep 01, 2007 7:55 am

If two flights with the same flight number are operating the same day, one of them will also be changed to avoid confusion (e.g. yesterday's flight operating today after a long technical delay, as well as today's flight operating as scheduled).

Just nitpicking, but BAW213, BAW215 etc. are flight numbes, not callsigns. BA's callsign as such is "Speedbird".