I am sorry about the loss of your friend. I was not there, but this to me is an obvious oxygen toxicity seizure. Where you diving nitrox or trimix? If so, what mix were you using? Do you guys do your own mixing? If you don't, do you check your mix with your own equipment?
Personally I've always feared an oxtox hit more than getting bent. Once in seizure, you are pretty much screwed.
Trimix, How to use Helium to improve your diving
The mix was checked when filled, and also on boat right before dive. The mix, the depth and the time were well within all limits. A seizure usually results in the inability to hold reg. in mouth, whichs results in drowning. This did not happen. Reg. stayed in mouth but breathing apparently stopped soon after.
Last edited: