So your first visit to 100' was in a cave. Nice...
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I never really understand how depth correlates with any sort of diving enjoyment.
I get enjoyment from both though. My perfect dive day usually involves two deeper dives and one shallow, but BP kinda forked that up for a while....
People are diving deep for hyberbaric oxygen therapy-like reasons? Diving to GET narc'd?
I never really understand how depth correlates with any sort of diving enjoyment.
Those are about the most ridiculous reasons to dive I can think of... There are safer, less expensive, less time intensive ways to get the same 'benefits'.
Your first two dives are deep because of some sort of imagined therapy? or because you're intended destination just happens to be deep?
They why dive nitrox at all? Lets all go deep on air, sweet narcosis comon at me. Stupid.
I'm saying its a stupid idea to dive deep for those reasons. Anyone DIVING for those reasons, is stupid IMO.
Deep, to be deep, is stupid. Lets all go drop in on some sand? Its deep, its gonna be sweet!
Half of safe diving is to counteract any sort of physiological effects, diving for those effects have been proven over and over to be stupid.
Deeper first is arguably not safer, btw.
Wow, sorry I started an argument.
There are plenty of reasons to dive nitrox that have nothing to do with narcosis. The vast, vast majority of my deeper dives are on nitrox, and I still sometimes notice a difference.
Any sort of physiological effects? I disagree. Otherwise most people wouldn't dive. That awesome feeling you get when you see a shark, or some new critter you've never seen is physiological. You don't get that from seeing a shark in an aquarium, or on television. Part of that, I believe is the environment, and the effects of that environment on the human body. One of the reasons I like diving is because I can exercise without getting hot or sweaty. I could counteract that with a drysuit, but why would I want to? You dive in shorts! Don't you know you could get hypothermia? Even in tropical locations? But you still do it, and I'm betting it's because you like the way it feels, and not because you think it makes you look cool I on the other hand, almost always wear a wetsuit in summer. Not because the water is cold, but to mitigate long term heat loss over multiple dives.
You're not going to eliminate inert gas narcosis with just O2 and Nitrogen at any mix. The best you can do is stick to a safe plan and recognize that those physiological effects are present. Don't believe me? Ask some trimix divers what they think. I'm betting you already know the answer, and probably better than me.
Here's my point: Take two dives, identical in every way, except one is at 90ft and one is at 30ft, and I'd bet the average diver will always say the deeper dive is better. Humans like to explore and press their limits (even if the "limit" exists only in their head). Just the fact that 90 is a larger number than 30 will be enough for most folks to choose the deeper dive, but add to that, a subtle, even imperceptible amount of intoxication, and I just don't see anyone choosing the shallower dive (as long as EVERYTHING else was equal, which in real life we know is impossible).