Deep dives deco

[buddha]

Planning some FIM deep dives (below -50), question arise: at what depth should we start planning an O2 deco? how long and at what depth? it's a normal scuba mix?
Thanks to the pros for their answers...

 

[efattah]

At a depth up to 70m, a single dive does not require deco unless you sprint the last 20m of ascent. Also assuming max one deep dive per day.

Beyond that, the normal protocol is 100% O2 at 6m for 5 minutes right after the dive, however for dives over 100m this (for some people) is still not enough.

If doing multiple deep dives per day, even two dives over 60m means deco after each dive.

 

[buddha]

100% O2 seems to me like it need an specific breathing regulator and tank, right?

 

[efattah]

You need an O2 qualified regulator for sure. If you can't get 100%, you can easily get 40% with normal equipment, it is still better than nothing.

 

[buddha]

Will ask in the nearest scuba shop and I'll let you know. Thank you very much.