*Floater*
Contributor
Hi Floater, thanks for helping me. So those equipment are "just" recommendations only so that mean I can keep using 1. Single tank, 2. Use a split although some DIRs would frown on it, 3. use an inflator-octo (Scubapro AIR2) 4. don't have to have drysuits?
The line between recommended and required is a little gray, at least in the initial GUE classes. Some instructors might let you use all sorts of non-DIR gear in hopes that you'd realize how inefficient they are, others might not. But if you want to DIR then split fins are off the table. You don't need jets, but you would need to use fins that work well for frog and back kick. Air2s are also not DIR because a regular backup reg on a bungee necklace is considered the better solution, especially for tech diving (but you are supposed to remain consistent). You don't need a drysuit in warm water, and iirc I've heard of people using 7mm wetsuits in GUE cave courses in Mexico, but my understanding is that GUE instructors use drysuits there, and in general DIR divers would opt for a drysuit even if a 7mm wetsuit would be warm enough because of the buoyancy characteristics of 7mm neoprene, at least that's what my DIRF instructor recommended. He said 3mm and 5mm wetsuits were fine.