[ACARS] Flight number change while in air

[Nick Birrell]

Fletcher wrote:
> 
> Hi All ,
> Notice the flight number changed while in the air from this B737(BBJ)  It starts as UV0000 and then changed to  UV7373 .
> Tony
> 
> ----------------------------------------------------09:37:42, 01/12/2002
> N737BZ B737-72Q(BBJ) 29102/101 Boeing-Company.Seattle.WA
> Biz Jet UV0000 Business Flight
> Using Ground Station 2 .Message No. M16A
> Message Type SA MEDIA ADVISORY (Downlink)
> Version Number:0 Media Lost:L Media Ident.:Inmarsat Aero H/H+/I/L Satcom Time:011737V/T
> 
> ----------------------------------------------------09:38:01, 01/12/2002
> N737BZ B737-72Q(BBJ) 29102/101 Boeing-Company.Seattle.WA
> Biz Jet UV0000 Business Flight
> Using Ground Station 2 .Message No. M16A
> Message Type SA MEDIA ADVISORY (Downlink)
> Version Number:0 Media Lost:L Media Ident.:Inmarsat Aero H/H+/I/L Satcom Time:011737V/T
> 
> ----------------------------------------------------09:39:32, 01/12/2002
> N737BZ B737-72Q(BBJ) 29102/101 Boeing-Company.Seattle.WA
> Biz Jet UV7373
> Using Ground Station 2 .Message No. D19A
> Message Type H1 GENERAL MESSAGE TO/FROM TERMINAL
> #DFB150N737BZ%'   ANCHORAGE 011217384214851754 -375 -640  390000795  65144480
> 73731CRS F GE0202GEC874330875332    00  7508 9888 -2758+++ 989 989 98
> 9 989 989 989  00  00 994 994 989 9891043104310191019 959 959 9
> 
> ----------------------------------------------------09:39:38, 01/12/2002

This is just an example of the fact that H1 messages are sourced from a
different unit (not flight numbers changing in flight, even though that
can happen) - there is NO NEED for a valid flight number for these
messages (per standard) so there can be any (and often is) old crap in
there. The difference here is that its a "bizjet" and not a commercial
flight. 

-- 
Nick