Flights cancelled at UK airports due to ATC issue (bbc.com)

123 pointsby contingencies16 hours ago116 comments

dtf 15 hours ago

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

8by3 15 hours ago

I briefly thought you meant the issue was NATS - https://docs.nats.io/learn/core-nats

Betelbuddy 15 hours ago

Its normally always DNS (Departures Now Stalled)

reactordev 14 hours ago

Not TCP (Takeoff Clearance Prohibited)

ukraina768768 14 hours ago

It's RST (russian state threat).

clickety_clack 14 hours ago

It only affected MACs (mediocre airtraffic controllers)

tosti 5 hours ago

They were causing interruptuons with TTL (Taxiing, Takeoff and Landing).

demibabs 13 hours ago

Lol is this page written by AI?

librasteve 4 hours ago

AI jokes would be funnier methinks

illwrks 15 hours ago

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)

ktallett 15 hours ago

You won't get compensation for ATC issues, but you will be reimbursed.

d1sxeyes 13 hours ago

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.

Daviey 10 hours ago

Delays yes... But once an airline cancels the flight, they become liable.

junofan 14 hours ago

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.

petercooper 14 hours ago

I believe the compensation part only kicks in if it’s the airline’s fault.

illwrks 13 hours ago

You may be right. As a direct result of the NATS issue perhaps not, but any second order issues once that is resolve you might be within scope.

d1sxeyes 13 hours ago

Almost certainly not. The legislation says: "An operating air carrier shall not be obliged to pay compensation [...], if it can prove that the cancellation is caused by extraordinary circumstances which could not have been avoided even if all reasonable measures had been taken."

That gets them off the hook for even second order effects. No harm throwing in a claim though, there's no penalty for having a claim turned down.

Dayshine 13 hours ago

NATS had failed once, so it failing again doesn't seem extraordinary to me.

d1sxeyes 2 hours ago

It is however extraordinary, and there don't seem to be any reasonable measures a carrier could take to work around it.

illwrks 12 hours ago

Fair point.

illwrks 13 hours ago

I think the qualifying rules may have changed since then.

The legislation is on the link below, it might be worth a once-over with your chat bot of choice to understand out if your circumstances are covered:

https://www.legislation.gov.uk/eur/2004/261/contents

Hard_Space 13 hours ago

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.

AnimalMuppet 13 hours ago

> 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...)

ericmay 13 hours ago

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

alexpotato 12 hours ago

> - 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).

Hard_Space 2 hours ago

>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.

yeputons 29 minutes ago

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.

tom1337 12 hours ago

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.

ifwinterco 4 hours ago

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

tom1337 4 hours ago

I mean one could do A/B weeks. Have two separate systems that do the same job managed by two different teams etc. and switch between the primary system every week. This way you can ensure both systems are stable.

surgical_fire 14 hours ago

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.

doublerabbit 15 hours ago

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; when words have no meaning behind the phase. Pixelated hold-music I am sure is designed to make you rage further.

ktallett 15 hours ago

Do you expect them to employ enough staff to answer passenger calls for this rare occasion? That is not good business.

Daviey 15 hours ago

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".

dylan604 15 hours ago

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.

donalhunt 14 hours ago

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.

ccppurcell 14 hours ago

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.

watwut 14 hours ago

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.

jdlshore 14 hours ago

Why would you guess that? “Prediction is hard, especially when it’s about the future.”

chairmansteve 14 hours ago

The problem is that the airlines don't let you know what is happening. They deliberately keep you in the dark.

exe34 14 hours ago

If they told you, they might admit more than they actually need to be held responsible for, so no reason to go wasting shareholder value.

ljf 14 hours ago

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.

technothrasher 13 hours ago

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.

Daviey 14 hours ago

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.

colechristensen 15 hours ago

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.

lbriner 15 hours ago

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.

blitzar 14 hours ago

Sounds like pedestrian push-buttons on crossings - satisfies people but it doesnt actually do anything.

watwut 14 hours ago

It wont turn green unless you push it here. If you dont push it, you will stand there like an idiot until someone else comes and pushes it.

Daviey 3 hours ago

https://www.bbc.co.uk/future/article/20150415-the-buttons-th...

There's also placebo buttons in many offices for aircon/heating.

tialaramex 13 hours ago

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.

StanislavPetrov 13 hours ago

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.

colechristensen 13 hours ago

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.

alistairSH 14 hours ago

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.

dboreham 14 hours ago

You really only know for sure when the captain walks up the jet way and tells the assembled passengers him/her self.

alistairSH 14 hours ago

That's fair, but the United announcements had enough detail and were timed with obvious crew movement (flight, gate, mechanical), so all seemed plausible enough. Maybe they were just blowing smoke up our collective ass, but a few details make a difference (for me, at least).

mcmcmc 14 hours ago

Why wouldn’t they be sorry? It’s bad for them too

gspr 14 hours ago

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.

ryandrake 14 hours ago

Whenever a company communicates how "sorry" they are, I can't help but think about South Park[1].

1: https://www.youtube.com/watch?v=9u0EL_u4nvw

SoftTalker 14 hours ago

What would you prefer they say?

idle_zealot 14 hours ago

Completely utilitarian message. "Your flight #FLIGHTID (src -> dst @ time) is cancelled on account of REASON. For available flights click LINK. For reimbursement click LINK."

donalhunt 13 hours ago

Even if they tell you the flight is cancelled, they seem hellbent in avoiding telling you why.

basisword 14 hours ago

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.

exogenousdata 13 hours ago

“We’re sorry, but our business model precludes timely responses in times of system stress.

As a reminder, our shareholders are our primary concern (by law) and staffing trained humans to handle in customer support during unexpected surges isn’t something that can be supported while also funding the €0.05 per share quarterly dividend paid to British Airways share holders on June 29th of this year.

We are not in a rush. If you’d like, try another airline. But they’re all the same.

Beep.”

Animats 13 hours ago

> “We’re sorry, but our business model precludes timely responses in times of system stress."

It doesn't have to be that way. Here's Haley Dragoo, former head of the New York Subway's "Twitter Division".[1] She had the sense to insist on a desk in the Rail Control Center, so she could know what was really going on. Down on the working floor, too, not up in the gallery overlooking the control room. She was a few meters from the people directly running the subway.

Her point was that the MTA was "good at monologues" but didn't interact well. So she posted on the MTA's Twitter account, several hundred times a day. If someone asked a serious question, she'd answer quickly, with actual info. Not sugar-coating the info, just translating from "subway speak". (The operations people talk about location in terms of distance from a reference point at the start of the line, the signal number plate on each signal, but customers think in terms of stations.)

It's very New York to do that.

The MTA has dropped Twitter/X, though. Twitter/X wanted to bill them for using the Twitter/X API, and the MTA will not pay others to distribute their info. So now the MTA uses their own web site and app.

[1] https://www.nytimes.com/2018/07/01/nyregion/subway-mta-socia...

GolfPopper 11 hours ago

This is true for so much of the human/corporation interface. I think it is so frustrating because it forces us to confront some major cognitive dissonance: we increasingly live in a world that isn't designed for us. It's designed by the corporations, acting under much different pressures.

Sure, you can say humans made these decisions. But at scale, that seems like saying our cells choose what we do.

bcraven 13 hours ago

"Sorry for any inconvenience"

What do you mean, it's ALL inconvenient!

small_model 14 hours ago

Wonder if any of this code was outsourced to India 'cut costs'

dv_dt 13 hours ago

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

maxrev17 13 hours ago

UK is a cesspit now

tialaramex 13 hours ago

That is specifically because the Tories privatised water. Historically, like most places, the vital-to-life water supply and corresponding sewage processing were owned by the public in England and Wales. People hated the idea of this being changed, but Tory doctrine says that absolutely everything should be owned by for-profit companies even though we know that can't work. So, first they forced the publicly owned companies to stop investing and then they privatised the water supply, wrote off all debt owed by the public institutions and handed the new private companies £1.5 billion because hey, if you believe in nonsense, why not?

The result was universally dismal, these private companies "leak" sewage into previously clean waterways, avoid taxes, divert as much money as possible to their off-shore owners, and of course they insist they constantly need higher and higher charges from their captive customer audience, then "oops" the money is used to pay off wealthy investors and none of the urgently needed work gets done.

librasteve 4 hours ago

I hate how the UK sewage system has failed. I agree that a good share of the blame lies with the for profit asset stripping owners. But just blaming 1980s Thatcher privatisation lets the government off the hook. The regulators (Ofwat and the Environment Agency) have watched this happen from the sidelines and failed to apply the law. Every “non exceptional” spill is a criminal offence with potential jail term, including actions of corporate conspiracy. The are 10,000s river and sea spills per year. Where is the punitive action? Why are the perps walking free? This is the soft corruption of the lobby and revolving door appointments (head of a water company one year, boss of the EA the next). Sure the only way to fix it now is (uncompensated) nationalisation, but the regulators have failed to anpply the regulations and are as much to blame.

dv_dt 3 hours ago

Regulatory corruption (regulatory capture) is a understood and predicted effect of privatization. It's the class that decided to start and stay on the privatization strategy that also hold the political power to regulate more strongly.

librasteve 3 hours ago

I recall that most Tory voters in the 1980s were "sold" on the idea of privatisation (and had real horror stories in relation to eg phone line installation delays).

One of the ideas was to widen share ownership to the average bloke. Sure - that never happened (although many average pensioners maybe hold Macquarie via an investment fund).

This "class" actually, in general, are very angry about regulatory capture and we blame the class of woke bien pensant "leaders" who back scratch and go in and out of the media, the lobby, the civil service, NGOs and the privatised utilities scratching each others' backs and telling us all we are idiots. [Rory Stewart being their patron saint]

Lagoon3384_SWE 12 hours ago

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.

varispeed 14 hours ago

IT sector in the UK is bargain basement. Most competent people left for countries where their talents are valued or retired.

ifwinterco 14 hours ago

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

Cthulhu_ 14 hours ago

It's also huge amounts of code for very old standards

IshKebab 14 hours ago

You know there was someone who tried to refactor whatever code it was that broke here and was told it was too risky.

stouset 13 hours ago

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.

IshKebab 5 hours ago

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.

gausswho 12 hours ago

Uh oh. For those of us with a connection through Heathrow morning of the 10th (in about 36 hours) what would you recommend?

lores 12 hours ago

There's really very little you can do bar booking an alternative flight at great expense. If you're lucky and you know the delay in advance, at least you may have a chance to take the Elizabeth Line into town and go for a stroll. I'd count a fat hour to go from the terminal to, say, Paddington. It's a pretty area and there are excellent Persian restaurants around.

PowPow619 13 hours ago

This brings up the ol' ATC government ran vs privatization debate

edoceo 13 hours ago

Then the nonsense is quickly put back in its place.

yehosef 13 hours ago

"I told it not to deploy until it was fixed."

talhaanwar 14 hours ago

happen after every few years

johnnyApplePRNG 14 hours ago

In the middle of a highly geopolitically sensitive moment where there's been bombs at other European airports recently?

Color me suspicious.

heyitsmedotjayb 14 hours ago

Immediately after UK announced sanctions on illegal settlements...

tacheiordache 14 hours ago

Israel sabotagged Spain as well, I can’t believe how naive most people are in support of Israel

heyitsmedotjayb 13 hours ago

Its disgusting the way they weaponize migration and racism.

somelamer567 13 hours ago

This would make ideal cover for a Russian hybrid sucker-punch.

I've spotted Russian trolls in the comments on YouTube blaming Israel for their hybrid attacks in Germany these past few days. They have form, and they have been preparing the information environment for ongoing hybrid aggression against Europe. The key "tell" it's Putin's thugs is because if ANY act is petty, thuggish, dishonourable and implausibly deniable, Russian intelligence are involved.

In any case, the perpetrators will be found and dealt with. The aggressors are dumb (otherwise they wouldn't be aggressors)... and slow learners. Ukraine can look forward to some additional aid in the coming weeks.

dude250711 14 hours ago

Better for the planet though.

dlcarrier 14 hours ago

Ocean liners use several times more fuel per passenger mile than airliners.

dewey 14 hours ago

Thats a bit of an odd comparison as they are in pretty different categories and don’t really compete against each other.

dlcarrier 12 hours ago

They don't in this case, because there's plenty of other airlines offering competing service, but when disruptions do prevent air travel, for example with the eruption of Eyjafjallajökull, travelers cruising to their destination will burn far more fuel.

Granted, the difference in emissions of either form of traveling are absolutely nothing compared to the emissions of Eyjafjallajökull itself.

stockresearcher 11 hours ago

The speed of the ship makes a huge difference in fuel consumption. Cruise ships/ocean liners usually go as fast as practicable, which leads to terrible fuel efficiency. Reducing speed from 20 knots to 15 knots may cut fuel consumption in half or more.

One thing I’ve noticed is that a lot of comparisons you’ll see will have, for example, a 5-day journey by cruise ship compared with an airline flight covering the same distance. Usually measured not in fuel consumed but carbon emissions. Ok, but shouldn’t the more accurate comparison be a 5-day cruise compared to an airplane trip plus 5 days in a hotel?

dlcarrier 4 hours ago

I once bought an overnight train ticket from France to Italy, instead of spending more on a high-speed train ticket and a hotel night. It would have been a great idea, if the train didn't have its heater stuck on, in August, and a broken emergency pull cord in an unknown car, which resulted in multiple unintended stops that required the staff enter every cabin to reset the pull cords, before resuming. I learned to check the reputation of the train line, like I would a hotel.

Anyway, traveling efficiency is a factor of the speed and size of the vessel and the viscosity of what it's traveling through. It's non-linear, and scaling up the vessel size slowly adds efficiency, and speeding up the vehicle or increasing the viscosity quickly reduces efficiency.

Boats have an advantage by getting very big, but a really, really big disadvantage if they go fast, which is why huge boats going slow is their most common use, mostly for cargo, but sometimes for people, when the ship itself can be a destination. Trains can't get very big, but air is much less viscous than water, so they can go a few times faster without major losses. This is why rail is really popular for transporting cargo across the US and Canada, although it's not fast enough for long distance passenger travel.

The absolute peak in energy efficiency comes from a large vessel moving through a very-low viscosity atmosphere, which is what airliners are able to do, by traveling in the stratosphere, eliminating the majority of the drag, and allowing for effectively uncapped speeds. Really, the faster an airplane can travel, the higher it can go, further reducing drag and increasing efficiency. The limit is technological, not physical, but current airplanes traveling around mach 0.8 get very high cruise efficiency from both being large and being in a low-viscosity atmosphere.

reaperducer 14 hours ago

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.

monocasa 14 hours ago

Calling everything "whatabouting" when someone is just responding and expanding context to an existing comparison is what's actually last decade.

maxrev17 13 hours ago

Last decade is so last decade

tialaramex 12 hours ago

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.

TomatoCo 14 hours ago

What's the alternative?

tialaramex 13 hours ago

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.

w4yai 14 hours ago

Who knows. Maybe someone will decide to compensate with 2 flights instead of one.

Havoc 14 hours ago

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

tcfhgj 14 hours ago

most flights are not necessary

IshKebab 14 hours ago

Define "necessary". Good luck.

tcfhgj 13 hours ago

the flight doesn't contribute to preventing harm to anyone

MaxBarraclough 13 hours ago

It's not uncommon to travel for medical care, or for medics to travel for work.

tcfhgj 13 hours ago

If you set traveling and flying equal, I very much think it is.

tialaramex 11 hours ago

The US has a bunch of highly paid medics who fly every week or in some cases every day because they work somewhere with enough population to justify their practice but they choose to live somewhere hundreds of miles away, and at their income it's actually practical to have a small private jet. It's probably only a small minority of the most highly paid (so e.g. cosmetic surgeons) where this makes sense but it's more than a handful of people.

Likewise because it's big and a lot of it is empty the US does more medical flights than a country like the UK, if a Wyoming multi-millionaire needs urgent treatment in a Californian hospital you're not going to load him into a truck and drive there, you use a plane. This is relatively high risk commercial air travel, it's not quite as dangerous as most GA but there's some get-there-itis because you don't want to abort the flight and let down your patient, and you're often flying one-off journeys whereas the people doing scheduled passenger travel it's like a bus, same route, every time, regular as clockwork, and if things go wrong you just scratch the flight and no harm, no foul.

IshKebab 5 hours ago

That is a super weird definition. If you only want to allow that you're going to have to ban basically everything.

tcfhgj 11 minutes ago

not everything is as harmful as flying

foxwell_1959 15 hours ago

Got me confused with that title, thinking what “100 seconds of flights” would look like.

gilleain 15 hours ago

About a minute and a half.

contingencies 14 hours ago

Sorry wouldn't fit ;)