7 ms·

You go significantly deeper? You're aware that shortly past 50mt the partial pressure of oxygen causes neurotoxicity, leading to convulsions and death? Anything

You go significantly deeper? You're aware that shortly past 50mt the partial pressure of oxygen causes neurotoxicity, leading to convulsions and death? Anything happening past those depths involves extremely expensive hardware, custom trimix breathing gases and most importantly a hell of a good reason to even bother doing it - that is NOT the environment for an Apple Watch.

nradov 7d ago
Yes, I go significantly deeper. You seem to be a little confused about how oxygen toxicity works but rest assured that we're aware of it and use appropriate breathing gasses for the depth. I understand that an Apple Watch Ultra can't be used for those dives, and that's fine — they don't need to support every possible niche use case. But competing smartwatches from Garmin and Suunto do handle deeper dives and the associated gas mixes. There's nothing stopping Apple from doing the same if they want to.
- gruturo 6d ago
  > You seem to be a little confused about how oxygen toxicity works Thanks for the condescending tone. Am I? At 1.4 bar of O2 partial pressure (therefore, with a 21% breathing gas mixture, at around 66m depth), oxygen toxicity causes convulsions and unconsciousness. If someone doesn't grab you and take you up, this likely results in death. Btw I had to google the precise values and depths to be accurate, but I'm not talking out my ass. I'm a certified CMAS and AOW diver with 80ish logged dives. Hardly a veteran but this was in my certification course and it's a very real thing - enlighten my confused state with your better knowledge please.
  - nradov 6d ago
    You're talking out your ass and unclear on the basics. Obviously we're using standard gas mixes based on the depth profile, not compressed air. For the working portion of the dive we generally limit PPO2 to 1.2 atm but will go as high as 1.6 for portions of the deco. If you'd like to understand diving physiology instead of just repeating what you Googled then Bennett and Elliott is a good place to start. https://www.us.elsevierhealth.com/bennett-and-elliotts-physiology-and-medicine-of-diving-9780702025716.html https://www.us.elsevierhealth.com/bennett-and-elliotts-physi...

nradov 7d ago

Yes, I go significantly deeper. You seem to be a little confused about how oxygen toxicity works but rest assured that we're aware of it and use appropriate breathing gasses for the depth. I understand that an Apple Watch Ultra can't be used for those dives, and that's fine — they don't need to support every possible niche use case. But competing smartwatches from Garmin and Suunto do handle deeper dives and the associated gas mixes. There's nothing stopping Apple from doing the same if they want to.

gruturo 6d ago
> You seem to be a little confused about how oxygen toxicity works Thanks for the condescending tone. Am I? At 1.4 bar of O2 partial pressure (therefore, with a 21% breathing gas mixture, at around 66m depth), oxygen toxicity causes convulsions and unconsciousness. If someone doesn't grab you and take you up, this likely results in death. Btw I had to google the precise values and depths to be accurate, but I'm not talking out my ass. I'm a certified CMAS and AOW diver with 80ish logged dives. Hardly a veteran but this was in my certification course and it's a very real thing - enlighten my confused state with your better knowledge please.
- nradov 6d ago
  You're talking out your ass and unclear on the basics. Obviously we're using standard gas mixes based on the depth profile, not compressed air. For the working portion of the dive we generally limit PPO2 to 1.2 atm but will go as high as 1.6 for portions of the deco. If you'd like to understand diving physiology instead of just repeating what you Googled then Bennett and Elliott is a good place to start. https://www.us.elsevierhealth.com/bennett-and-elliotts-physiology-and-medicine-of-diving-9780702025716.html https://www.us.elsevierhealth.com/bennett-and-elliotts-physi...