@norwhal The issue of doing dives with when there is no clear route to the surface, is planning for the worst scenario; going OOG at the furthest point from an exit. Are each of the divers carrying enough gas that if an OOG situation happens there is enough to get all divers out and to the surface. Two divers breathing from the same cylinder can easily consume over 50Lt/min, and with cheap regs beat the 1st stage so it doesn’t deliver the gas required.After thinking about it on the overnight, I don't think I'll be doing the reel retrieval thing or cut the line off, given some of the comments on this thread, however as per @lermontov, my buddies may be returning along a potentially silted passageway (I'll be last and I'm good with even zero vis).
I'd be more than happy to tell the Dive Op that I plan to run a reel for some light penetration- but what if I do and they say "sorry we can't allow that"?
The dive profile you posted shows you exceeded the MOD for Nitrox32, for most of it you were pushing the boundary. Neither is good practise.
500 dives, that explains it; your in the death range.. You’re at the point where you know it all. When you get past the thousand you will realise there is a lot more to learn.