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Airlines are running out of 4-digit flight numbers

viewfromthewing.com

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Re: Airlines are running out of 4-digit flight numbers

#231
post #83

I love that so many people here think they can think about the problem for 10 seconds and come up with a solution that hasn't already been considered a thousand times and discarded.

If you like a similar problem to scratch that itch there is also the 37 dogs problem. https://www.youtube.com/watch?v=jMxoGqsmk5Y - a database whose primary id had a maximum of 6 digits, but the id was encoded as roman numerals.

Re: Airlines are running out of 4-digit flight numbers

#232

I'm remembering the ISBN switch, which I thought would throw off some older systems—and it probably did, but it took so long to happen that the transition ended up being pretty smooth. The key element was that for a solid ten years or so, every book had both an old-style and a new-style ISBN (and possibly some still do). I'm hoping that behind the scenes they really are looking at a better plan than just "work around…

I still love the bit of book trivia that since 13 digit EAN's start with a country code, you can convert an ISBN-10 into an ISBN-13 by prepending it with the code for "book land" - 978. (I worked on Library Management Software for 6 years).

You also have to recompute the check digit, of course, for example: 0131103628 -> 9780131103627

Re: Airlines are running out of 4-digit flight numbers

#233
post #227

> Here’s the full answer, along with how they triage the problem – for instance by assigning the same flight number to more than one flight a day (although that means they need for it to be flights that would never both be in the air at the same time, such as where the same plane is used and can’t reasonably be substituted) This sounds like it's calling for trouble! Whenever I hear that any IDs could be "recycled", I…

Last year the UK ATC system crashed when it "encountered an extremely rare set of circumstances presented by a flight plan that included two identically named, but separate waypoint markers outside of UK airspace".

https://www.nats.aero/news/nats-report-into-air-traffic-cont...

Re: Airlines are running out of 4-digit flight numbers

#234

Earlier quoted context omitted.

IPv6 is seen and used directly by professionals, not the general public. Overbuilding it in the sense being mocked made sense.

> IPv6 is seen and used directly by professionals, not the general public Yes, that's the problem. It's unusable on your fucking home network. Please, don't post again the 10 "concise" 50+ page documents that you "just" need to read to set up ipv6...

I don't really understand. My router gives me an IPv6 address...

Re: Airlines are running out of 4-digit flight numbers

#235
post #227

> Here’s the full answer, along with how they triage the problem – for instance by assigning the same flight number to more than one flight a day (although that means they need for it to be flights that would never both be in the air at the same time, such as where the same plane is used and can’t reasonably be substituted) This sounds like it's calling for trouble! Whenever I hear that any IDs could be "recycled", I…

Hey they are inventing NAT. Nice.

Re: Airlines are running out of 4-digit flight numbers

#236

Earlier quoted context omitted.

A collaboration between the US Department of Transportation and the Department of Energy. Lots of solid engineering out of Oak Ridge, Argonne, Sandia Labs. Make it a system owned and operated by the FAA.

> Lots of solid engineering out of Oak Ridge, Argonne, Sandia Labs. Researchers and academics are quite possibly the last people on earth I would ask to deliver safety-critical software.

I am curious why you feel that way.

Re: Airlines are running out of 4-digit flight numbers

#237
post #83

I love that so many people here think they can think about the problem for 10 seconds and come up with a solution that hasn't already been considered a thousand times and discarded.

If you like a similar problem to scratch that itch there is also the 37 dogs problem. https://www.youtube.com/watch?v=jMxoGqsmk5Y - a database whose primary id had a maximum of 6 digits, but the id was encoded as roman numerals.

Haha nice, entertaining watch.

Re: Airlines are running out of 4-digit flight numbers

#238
post #109

Earlier quoted context omitted.

Any well-written article should anticipate, ask, and answer the obvious questions. For example: Why not use alphanumeric characters? And if the answer isn't known by the sources the writer quotes, the writer should say so.

Answered in this comment by “hagbard celine” under the article: https://viewfromthewing.com/airlines-are-running-out-of-flig...

But then at the bottom of the article it said

>They also still have fun with flight numbers for instance running flight 1776 between Philadelphia and Boston; flight 1492 to Columbus; AAA777 to Las Vegas;

AAA777.

Am I missing something?

Re: Airlines are running out of 4-digit flight numbers

#239
What would stop the airlines to use more than one airline code? For example for American Airlines not only to use flight numbers like AAxxxx but also ABxxxx. AB is assigned to Air Berlin, which went out of service in 2017.

Edit: A1 seems to be unassigned, which might be even better, to not create confusions.

Re: Airlines are running out of 4-digit flight numbers

#240
post #227

> Here’s the full answer, along with how they triage the problem – for instance by assigning the same flight number to more than one flight a day (although that means they need for it to be flights that would never both be in the air at the same time, such as where the same plane is used and can’t reasonably be substituted) This sounds like it's calling for trouble! Whenever I hear that any IDs could be "recycled", I…

> This sounds like it's calling for trouble!

It is, and from what I hear it's routinely causing hiccups in the German freight train network with its sometimes really ridiculous delays that sometimes can add up to > 24 hours.

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