4 ms·

Reminds me of Shadow Divers. IIRC they were instrumental in coming up with a breathing mix to counteract these effects https://www.amazon.com/Shadow-Divers-Adv

• nradov 3y ago
  Shadow Divers is a good book, but the subjects were hardly the first to use helium mixes to counteract narcosis. That goes back to US military experiments in the 1920s.