Earlier quoted context omitted.
Yes for caves. Caves are easy and safe compared to deep open ocean wrecks. Caves may actually be within the "reasonable to do recreationally" level, and WKPP is or was actually doing worthwhile environmental science too. Outside of the US, helium is seriously expensive. I was figuring dual rebreathers, or rebreather + OC bailout. $800 in gas alone for a 100m training dive for TDI Adv Nitrox, open circuit. WKPP and GU…
Outside of the US, helium is seriously expensive. I was figuring dual rebreathers, or rebreather + OC bailout. $800 in gas alone for a 100m training dive for TDI Adv Nitrox, open circuit. It has been almost a decade since my Adv Nitrox course, but I am trying to figure this one out. You are not doing trimix and from what I remember of the the course spec you are mostly working around bottom mixes that are hypoxic at…
Nitrox, even 100% o2, is cheap. A lot of places do free nitrox now, it is just a little more hassle to analyze your tanks. Especially on boats with membrane systems.