Guys, to be able to go on this trip, you should already be experienced enough or have the qualifications to decide on the gases to be used for such dives.
Let the individual diver make his/her own choice can?
If already qualified and/or experienced enough, he/she can use air to 100m for all I care...........
I do agree on the experience and qualifications also on the individual choices but I won't agree nor letting an individuals going down to a depth using air which could jepordise and risking the team. When u do tech diving, always think of safety and your team.
I had done a 74metres dive using air but how stupid am I at that time and I'm lucky nothing happened to me. As what we know, on the pO2 thing, anything more than 1.6 are considered unstable. It is adviseable not to exceed that and not only that, others too (OTUs etc...) Dive safely, guys.
Just my humble opinion....