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NATS - the same system that crashed in August 2023 [1] due to an id clash, causing 2000 flights to be cancelled and days of chaos.

[1] https://news.ycombinator.com/item?id=37461695

I briefly thought you meant the issue was NATS - https://docs.nats.io/learn/core-nats
Its normally always DNS (Departures Now Stalled)
Not TCP (Takeoff Clearance Prohibited)
It only affected MACs (mediocre airtraffic controllers)
They were causing interruptuons with TTL (Taxiing, Takeoff and Landing).
Lol is this page written by AI?
Including mine. I'm not angry because my flight was cancelled. It's a pain in the arse but what really infuriates me is the "We are terribly sorry" these PR releases give. I've been on hold for three hours with British Airlines and it's "we are sorry", no you're not.

"We are truly sorry for the ongoing flight disruption" is what infuriates the situation; it's when the words have no meaning behind the phase. Pixelated hold-music is designed to make you rage further.

Do you expect them to employ enough staff to answer passenger calls for this rare occasion? That is not good business.
My wife is currently at Gatwick, supposed to have taken off 2 hours ago, but no update.... The frustrating thing is the complete lack of information. I cannot comprehend how nobody knows what the situation is. I mean, is aircraft on the tarmac yet? Has it left it's previous destination yet? etc.

Worst part is, likely no compensation as it isn't the airlines "fault".

Why the use of scare quotes? It's not their fault. The airline arranged for flight crew, had the plane available, yet something outside of their control is preventing them from doing the deed. It's no different to the airline if a sudden bit of weather came along preventing the flight from taking off.
I think the frustration comes from airlines not being able to accurately predict what the impact of a delay will be for the schedule for the remainder of the day, following day. They always hope they'll be able to recover some of the schedule with fast turnarounds.

On a recent trip (when I encountered issues on every leg — cancellations, delays, missed connections, you name it), it is clear that airlines are incentivised to not communicate delays until it is clear the delay can't be recovered. In one case, at the airline's hub, the airport displays were showing a 2 hour delay and their app showed on-time departure (to the point I had to go and ask which source to trust). Having been a frequent flyer in the past I was able to determine that the delay was likely (but airlines can swap in equipment at hubs and mitigate the delay).

Once you do have a delay the ripples are complex to handle. You have some passengers that were meant to connect to other flights. You have some that won't travel at all die to the cancellation. You then have 100+ people who you somehow have to accommodate in the coming days when flight loads are hopefully already 90+%.

To be fair to my airline, their app was actually great at offering me a rebooking option the following day when my flight was cancelled. Unfortunately, the option I selected resulted in a non-direct flight with a transfer time that was impossible in reality (shouldn't have been offered in my opinion). I was literally rebooked 5mins after they declared the flight cancelled, skipped the queues back in the departure area (I don't think the local service agents even knew about the app) and drove home to my family for an extra night.

I'm going to guess that they have really good predictions, it's just that it doesn't benefit them at all to reveal those to customers.
Because making prediction and being wrong is way worst then not making one.

Plus, imo, they dont know what exactly will happen. There is likely whole bunch of negotiations and replannings going on in background with unsure results.

Why would you guess that? “Prediction is hard, especially when it’s about the future.”
The problem is that the airlines don't let you know what is happening. They deliberately keep you in the dark.
In the UK we use quotation marks when we are quoting some verbatim.

Scare quotes are an Americanism that is gaining traction her, but normally we use it for quoting speach.

Why do you claim it is an Americanism? The term 'scare-quotes' was coined by a British philosopher, Elizabeth Anscombe, who references her use of them in a 1956 essay. This would imply that they were in use in British English at least by the 1950s, with no indication as to whether they were imported from US English.
Because we very rarely use the term here - it might have been coined here but it has only limited traction. Most people will call them quote marks/quotation marks, and realised that they mean the text is a direct quote of something that has been spoken or written.
Because nobody in this situation is accountable. I agree the airline may not be to blame for the cause, but SOMEONE is... but NATS do not carry the same responsibility.

It blows my mind that consumers have lots of protection from the airline, but we have no protection from ATC failures.

As it happens, flight just got cancelled.. so airline is responsible for hotel and rebook. Which is also unfair on them.

People will be angry regardless of what they say, some if they say they're sorry, some if they don't say they're sorry. Regardless of what they say, some set of people or another is going to come out and be angry about it.

What do you hope to accomplish with the phone call?

Failures happen, does it make a difference if there's someone in charge feeling a strong emotion about it? Do the call center staff have to feel genuine guilt as if their mediocre job somehow made them personally responsible?

Being angry is just as useless as faking being sorry, all they're doing is acknowledging a screwup in an automated message. Give them a break.

I suspect there is a name for thinking that, "if I do something, it will get resolved quicker". Lots of us won't just sit there and wait for someone to come and tell us when it is fixed because we don't trust that other people also want to resolve the problem.
Sounds like pedestrian push-buttons on crossings - satisfies people but it doesnt actually do anything.
This is, at best, misleading. It is common that a junction running at capacity with a pedestrian phase will always run that phase with the same timing regardless of buttons, but that same junction (never mind other junctions) may often not be running at capacity, whereupon that pedestrian phase is inserted when demanded.

Also of course outside of a junction the control system has no reason to stop the vehicular traffic if nobody demands to cross. So even in the middle of the day the only reason somebody who refuses to press the button can ever cross is that other people will press the button.

To be fair, this sort of thinking is not entirely wrong (although it may be in this case). Your priorities are not necessarily the same as whatever person/worker you are dealing with. And the priorities of the worker you are dealing with are not necessarily the same whatever organization/company/government they are working for.

For example, I was recently at the hospital to pick up a friend who was due to be discharged that day. I arrived in their room, spoke briefly with the attending nurse who said it would be a long while before the patient was discharged (as it always is at hospitals) and sat down to wait. After a couple of hours I checked in with the nurse, who said he was waiting on the social worker. My friend noted that he had already talked to the social worker, and despite her insistence, said that he didn't want or need any sort of nursing or in-home care after discharge. When the nurse heard this, he went back, printed up the discharge papers and we were soon on our way.

Why did this happen? Because job of the social worker is to push the hospital/network's post-discharge nursing and rehab system. Once this was turned down, she had no incentive to stay involved or update the discharge status. The busy nurse had no incentive to pro-actively scrutinize the forms and decide the patient was ready for discharge. The hospital itself (as an organization) had no incentive to speed up the discharge, as they were making tens or hundreds of thousands of dollars from his excellent insurance coverage.

If we had just sat around, and said nothing, we almost certainly would have been there for several more hours, until the next shift of nurses came in and reviewed the patient files. Sometimes you are just screaming into the void but many times it helps to speak up.

Very little you can do will have any effect on how an airplane airplanes, particularly in a systematic failure.

Advocating for your health care can have very large effects, healthcare suffers from a strong lack of someone being in charge of and following your care, it's more like a collection of poorly communicating agents giving you brief spurts of attention somehow leading to a resolution. In other words, folks are barely paying attention to you.

In the past year, I've flown for vacation twice, with delays on one leg of each.

First one, United flight from IAD to SJU, 4-5 hour delay, mechanical issue, with updates from the gate agent every 45 minutes or so, basically keeping us well apprised of the status of our plane (and when that plane was no longer viable, of the replacement plane and then replacement crew). "Flight crew saw a warning light and needs to talk to company" then "company says try again" then "that didn't work, maintenance crew coming to look at it" then a few more similar updates. No, there was nothing we could do with the info, but it was nice to know the problem was being worked - at least made me feel less out of control.

Second one, Aer Lingus from DUB to IAD, 4 hour delay, mechanical issue, no updates from the gate agent beyond "so sorry, we're delayed another hour" every hour or so. I found this much more frustrating. No, there was nothing I could do either way, but it would have been nice to know a bit more about what was wrong, who was working the problem, etc. This felt more out of control, and more frustrating.

You really only know for sure when the captain walks up the jet way and tells the assembled passengers him/her self.
Why wouldn’t they be sorry? It’s bad for them too
Because only people who aren't actually sorry spend their time saying sorry instead of doing the one thing that would actually help people – provide detailed information on what the hell is going on.
What do you want them to say? It's an ATC issue. The airline don't know when it'll be fixed and can't do much until it is.
"Sorry for any inconvenience"

What do you mean, it's ALL inconvenient!

Did they also start hiring unqualified people under the disguise of DEI like USA?
For anyone stranded, read up on UK261/EU261 and your airlines application process to be reimbursed. As far as I’m aware it’s not likely to happen automatically, you need to initiate the process (and record audio/video just in case proof is needed)
You won't get compensation for ATC issues, but you will be reimbursed.
Yeah but I don't think it's that legislation you'd rely on: you paid for a service they didn't deliver.

Compensation yeah, only applies if the reason for the delay/cancellation was under the airline's control. Nats down is pretty clearly a reason to reject compensation claims.

Delays yes... But once an airline cancels the flight, they become liable.
Eh, I tried in 2017 with BA when their system went down and received nothing. There was magically a Black Lives Matter protest at Gatwick (or maybe LCY, can’t remember) on the same day, which isn’t covered apparently.
I believe the compensation part only kicks in if it’s the airline’s fault.
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Got me confused with that title, thinking what “100 seconds of flights” would look like.
In the middle of a highly geopolitically sensitive moment where there's been bombs at other European airports recently?

Color me suspicious.

Better for the planet though.
Ocean liners use several times more fuel per passenger mile than airliners.
Ocean liners use several times more fuel per passenger mile than airliners.

So what? Two things can be bad at the same time. Nobody mentioned ocean liners except you. Why not bring up the greenhouse gases from landfills while you're at it?

Whatabouting everything is so last decade.

There is exactly one actual ocean liner left, QM2 which goes between my home city and New York. Most of the ships you're thinking of are Cruise liners, which are not in fact (unlike an airliner or ocean liner) designed to prioritize travel but are instead floating hotels which might happen to travel from one place to another.
What's the alternative?
Really often the alternative was not to make the journey. Whether that's the in-person visit to a customer site which could have been a video call (or an email) or the trip to go see how your Porsche was made in the factory.

WG21 (the C++ Standards Committee) only began to allow you to present proposals or attend committee meetings without flying around the world in... 2020 because of Pandemic restrictions.

Video conferencing was one of the technologies in Engelbart's "Mother of all demos" in 1968. Remember that year, not 2008, not even 1998, it was demonstrated in 1968 and yet I bet several readers of this comment have flown on an aeroplane to do something they could have done using video conferencing, almost sixty years later. What a joke.

Oh, of course, but I mean for moving people who want to move around. Someone else observed that ocean liners are less efficient than planes, so if you wanna go overseas there's no alternative.

Except, of course, for business meetings which can be virtual (or just an email). I'm asking what's a practical alternative assuming we still want people to be able to go overseas. I agree for land routes high speed rail is better, too. I don't really understand my downvotes just for asking about alternatives.

Who knows. Maybe someone will decide to compensate with 2 flights instead of one.
Don't think so. The people will still need to fly and incidents like these mean lots of planes are out of place and may need to fly extra to reposition
most flights are not necessary
IT sector in the UK is bargain basement. Most competent people left for countries where their talents are valued or retired.
It's fine for fintech etc, but air traffic control software yes I imagine not so much.

Likely either outsourced or done by people who are comically underpaid considering how important it is

It's also huge amounts of code for very old standards
You know there was someone who tried to refactor whatever code it was that broke here and was told it was too risky.
I’m way more often than not on the side of refactoring but there’s risks on both ends with a mission-critical service like this. Neither side is zero risk, the choice is about which option will result in fewer and less severe outages.
Sure, the problem is most people can only see the risks of changing code. They're completely blind to the risks of not changing it.
Wonder if any of this code was outsourced to India 'cut costs'
Following neoliberal economic strategy has optimized for profit maxing over basic quality of life, let alone competency of building and operating complex systems. While the US is #1 in the trend, the UK is following pretty closely
ofc this is downvoted on this site (by Indians and naive white western people)

Sweden has changed so much in only 15-20 years, I can remember what it was like and I weep.

This affected flights going to the UK as well.

Source: Me, stuck in an airport, having witnessed numerous flights destined to London canceled throughout the day.

This brings up the ol' ATC government ran vs privatization debate
Then the nonsense is quickly put back in its place.
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Just had to cancel my 10-year passport renewal appointment for tomorrow morning, since it's in London and I'm in the EU. Man, this was a *miserable* way to spend a day. The flight kept getting bumped, heading for certain cancellation (it came, about midnight, long after I had returned from the airport); GPT was incredibly helpful on how to redeem (most of) the shit-ton of money I had paid for a 4-hour passport renewal appointment, and what my rights and obligations were in this situation.

In particular it pointed me to authority docs declaring that if a flight is 5+ hours late, you can refuse to fly, reclaim the money and exit the airport. So when the next update said that the flight had been bumped 9 hours, I had all I needed to secure that and went home. Two hours later, the app announced the flight was cancelled.

Sometimes (really a lot) I want to kick GPT's/Claude's/Gemini's collective rear ends. And then there are times like these, when, with me in a funk, AI cuts straight through to the essential knowledge I need and lowers the temperature.

> In particular it pointed me to authority docs declaring that if a flight is 5+ hours late, you can refuse to fly, reclaim the money and exit the airport.

What jurisdiction? EU? (I would love for that to be true in the US, but I bet it isn't...)

I just did a Google search[1] and here's what I found:

  - US airlines do not pay cash for delays
  - You’re entitled to a full refund for a significant delay if you choose not to travel
  - Full refunds are paid within 7 business days for cards (20 calendar days for other payment methods)
  - Paid extras (baggage, upgrades) are refundable if you didn’t receive them
  - Airline policy dictates reimbursement for meals, hotels, and other expenses after a delay
"A refund for significant delays or changes to your flight: You are entitled to an automatic full cash refund (including taxes and fees) if your flight is "significantly changed" for any reason, and you turn down a rebooking offered by the airline. Airlines might push you to accept vouchers and travel credits, but you are entitled to a cash refund. If you do not want a voucher, just tell the airline you prefer to be refunded in cash."

  - Delays your departure or arrival by 3 hours for domestic flights and 6 hours for international ones,
  - Changes to your departure or arrival airports, 
  - Increases the number of connections 
  - Downgrades your class of service
  - Changes your flight to different airports or aircraft that are less accessible for persons with disabilities."
[1] https://airadvisor.com/en-us/flight-delay-compensation
> - Full refunds are paid within 7 business days for cards (20 calendar days for other payment methods)

I remember on the show Airline (docuseries about Southwest Airways) one of the passengers didn't want to fly and asked for a refund.

One of the employees was shown giving the passenger a refund of, IIRC, $27 in cash (b/c she bought the ticket in cash).

>What jurisdiction? EU?

Flights starting out from the EU and going anywhere (EU or beyond).

Flights coming into the EU from anywhere. If the plane at any point is set to land in the EU, it's covered.

I thought "coming into the EU" is only covered for EU airlines? So a non-EU airline flying outside EU into EU is not covered.
You could be right but that is not what I read on what seemed to be a reasonable authority site the day of the outage. Lost the link, of course.
"I told it not to deploy until it was fixed."
Uh oh. For those of us with a connection through Heathrow morning of the 10th (in about 36 hours) what would you recommend?
Currently stuck at an airport in london. It's insane how little information the staff here has. Also mindboggling that in aviation, where everything has a backup or two there seems to be a single company with a single software that can take down an entire airspace which most like will create worldwide ripple for the next days.
It’s an absolute clown show that it was down for 4 hours, but would you want to be flying in some of the busiest airspace in the world on a “backup” ATC system that isn’t normally used?

Personally I would not

Don't browse HN after watching Slow horses...