• @ClutchCargo@sh.itjust.works
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    891 year ago

    Let me add some context from the perspective of an airline pilot who is also is a company training captain.

    All modern transport category aircraft are equipped with a system called TCAS, or Terminal Collision Avoidance System.

    TCAS operates by interrogating the TCAS system of other aircraft in a defined proximity ring based on some variables like altitude and rate of closure and resolves a climb/descend/level command to each aircraft, which we pilots train regularly to execute. The system is a near perfect solution to deconfliction when collision is probable.

    With daily average flights in the US alone around 45 000, the amount of “near misses” is an incredibly small percentage. In 15 years of flying TCAS equipped aircraft, I’ve had 5 actual TCAS RAs (RA stands for resolution advisory - the actual avoidance maneuver)

    Another way to look at it is: when was the last mid-air collision in the US, or even the world involving TCAS equipped airliners? The only one that comes to mind is the DHL-BAL mid air in 2002, which was a result of the one crew not following the TCAS instruction.

    This article can fuck right off.

    • @HappycamperNZ@lemmy.world
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      321 year ago

      For those that don’t speak plane, this is like saying every red light that tells you to stop and wait for someone is a near miss.

      Pilot above is saying they got a red light 5 times in 15 years… hell, they got a give way 5 times when there was actually something there would be more accurate.

      • @14th_cylon@lemm.ee
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        1 year ago

        I see you don’t “speak plane” as well, because this is a terrible explanation

        Obeying red light is like obeying air traffic. controller.

        getting TCAS advisory is as if you had a system in your car that would tell you “you are too close to the car In front of you - slow down!”

    • @paintbucketholder@lemmy.world
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      81 year ago

      Another way to look at it is: when was the last mid-air collision in the US, or even the world involving TCAS equipped airliners? The only one that comes to mind is the DHL-BAL mid air in 2002, which was a result of the one crew not following the TCAS instruction.

      A significant part of the report focused on near collisions on runways.

      TCAS doesn’t mitigate that, right?

      • @HappycamperNZ@lemmy.world
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        31 year ago

        I believe you are getting pedantic - when they got conflicting info they didn’t follow the TCAS. Point remains, they didn’t follow the TCAS.

        • @Elderos
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          61 year ago

          The call was ambiguous at the time and they ended up settling out of court. I guess it is only pedantic if you consider that detail to be irrelevant to the broader discussion of air safety. Otherwise, zeroing the fact they didn’t follow he TCAS could be considered pedantic.

          Only one thing is sure, I am currently being pedantic about the usage of the word pedantic. But really, I think the relevancy of this detail depends on who we’re putting the blame on. If it was a human error, then, point remains. If it wasn’t, then it ain’t just a matter of if the TCAS was followed.

          I am aware nowadays this would be considered a human error though, not listening to the TCAS I mean.

          • @HappycamperNZ@lemmy.world
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            01 year ago

            Im going to chat with you as you provide a much more balanced arguement than personal-attack-know-it-all i have been talking with.

            Yes, the call was ambiguous and easily debatable at the time - no disaster is ever one mistake and unfortunately in this case everyone paid for it with their life, including the ATC controller.

            The TCAS was designed and taught as a last resort option, and was to be followed instantly and overruled everything, including ATC. Unfortunately it only works if everyone follows it - one did, one followed atc and they dived into eachother. The system failed because it wasn’t followed, and at the end of the day the pilots knew that TCAS took priority. The pilots are in final command and responsible for their aircraft, and cant blame anyone else who gave instructions anymore than the holder of a firearm, captain of a ship or driver of a vehicle.

            Modern understanding adds a number if factors into play, namely peoples reaction to authority in an emergency. Pilot error caused the crash, but there are multiple factors that went into their error - external authority (who pilots are used to listening to), sudden need to react in an uneventful flight, cant remember if there were training, equipment and fatigue issues or not, and a pile of others. No one reacted recklessly (don’t know why other poster thought I said that), just instantly with no chance to second guess their choice.

        • @14th_cylon@lemm.ee
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          11 year ago

          no i am not and no, the point definitely does not remain.

          first, phrasing it like “they didn’t follow TCAS” make them sound like some reckless cowboys, which is simply not the case. they did exactly what they were told by tcas and when they got contradicting order from ATC the did exactly what they were told by him.

          second, the statatement “was a result of the one crew not following the TCAS instruction” is simply not true. the accident was a result of ATC (as in the organization, not the specific people having the shift that night) fucked up". reading that linked wiki article may be good place to start to learn about the accident.

          • @ClutchCargo@sh.itjust.works
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            21 year ago

            Had both aircraft followed those automated instructions, the collision would not have occurred.

            That is right from the wiki.

            I never claimed the pilots were “cowboys”, you made that up in your head. I simply said the accident was a result of not following TCAS, which at its core is correct. Of course there are multiple contributing factors, ATC being the largest, but my post was already getting long winded.

            • @14th_cylon@lemm.ee
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              1 year ago

              and had all the pilots overslept that day the incident might not have happen as well and in spite of that, we don’t list them getting out of the bed in the morning as a reason of the accident.

              them obeying the atc command was reasonable and expected course of action.

              • @ClutchCargo@sh.itjust.works
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                01 year ago

                them obeying the atc command was reasonable and expected course of action.

                That’s incorrect, and is exactly why we train to ignore ATC commands and follow TCAS advisories. We don’t even tell ATC if we’re climbing or descending, simply “Aircraft XYZ, TCAS RA”

                  • @ClutchCargo@sh.itjust.works
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                    -11 year ago

                    According to the wiki…

                    TCAS was a relatively new technology at the time of the accident, having been mandatory[Note 2] in Europe since 2000.

                    Two years prior to the accident, in Europe, where the accident happened.