IATA/ATA codes are used for reservations systems, etc. In the USA, 3 letter codes are used for domestic flight planning and ICAO for international flights (or at least that the way it was when I worked for the FAA a few years ago) David R http://home.attbi.com/~damiross http://home.attbi.com/~damiross/books.html ----- Original Message ----- From: "Mike Gammon" <jmgammon@xxxxxxxxxxxx> To: <AIRLINE@xxxxxxxxxxxxxxxxx> Sent: Tuesday, August 19, 2003 04:45 Subject: Re: [AIRLINE] Full power in YUL > I go by the code I use when I file a flight plan, which is the code in the Canada Flight Supplement and the Canada Air Pilot. Which is the ICAO code. At least in Canada, ICAO codes exclusively are used for flight planning. > > Mike Gammon > > > > > From: damiross2@xxxxxxxxxxx > > Date: Mon, 18 Aug 2003 20:39:59 +0000 > > To: AIRLINE@xxxxxxxxxxxxxxxxx > > Subject: Re: Full power in YUL > > > > (sorry if this is a duplicate - am having e-mail problems today) > > > > You're confusing the ICAO and the IATA codes. > > The ICAO (International Civil Aviation Organization) assigns a letter to > > different regions of the world (C is Canada, K is USA (except Hawaii and > > Alaska, which are part of the P region), Europe is E, etc. In the USA (K only) > > and Canada, the ICAO code is the prefix plus the IATA 3 letter code; in the > > rest of the world, it is the prefix plus a country code and a 2 letter airprot > > identifier. > > > > Examples (city/ICAO/IATA): > > Montreal/CYUL/YUL > > Los Angeles/KLAX/LAX > > Chicago O'Hare/KORD/ORD > > Ottawa/CYOW/YOW > > Fairbanks/PAFA/FAI > > Honolulu/PHNL/HNL > > Kahului (Maui)/PHOG/OGG > > London (Heathrow)/EGGL/LHR > > > > David R > > > They don't all start with a "Y". My home field (Bromont, Quebec) is classified > > > as an "airport" (that is it is licensed as such by Transport Canada, as opposed > > > to an aerodrome, registered or not; this information can be found in the Canada > > > Flight Supplement), but its call letters are CZBM (in fact all Canadian airport > > > designators now start with C) > > > > > > In point of fact over time "Y" as the second letter in the designator has come > > > to mean an aiport where weather observations were made, either by a weather > > > observer or an automated station, and hence METARs and TAFs are available for > > > that station. > > > > > > YMMV, it could be that by now some "Y" fields no longer have Wx services. > > > > > > Mike Gammon > > > > > > > > > > > From: Matthew Montano <mmontano@xxxxxxxxx> > > > > Date: Mon, 18 Aug 2003 08:49:10 -0700 > > > > To: AIRLINE@xxxxxxxxxxxxxxxxx > > > > Subject: Re: Full power in YUL > > > > > > > > Actually airports start with an 'a'. > > > > > > > > Just kidding. > > > > > > > > Most Canadian airports had their three-character designation derived > > > > from their 2 digit rail code prefixed by a Y. > > > > > > > > Of course, time has passed and there are a few Canadian airports with > > > > the Y, and many using codes that have nothing to do with a rail > > > > station. (YYZ, YXX.).. > > > > > > > > And of course there are a few that have a city type code, but the > > > > airport is no where near the rail station. YEG - for Edmonton. > > > > > > > > Matthew > > > > > > > > On Monday, August 18, 2003, at 12:40 AM, Alireza Alivandivafa wrote: > > > > > > > > > Pretty cool. Did they send any to YMX? Oh, speaking of Canadian > > > > > aviation, > > > > > why do all the airports start with Y? > > > > > > > > > > > >