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Welcome! This is a fabulous forum as you already know :)

Youth

If I were a legislator, I would impose different tax on medical grade, aviators grade and welding oxygen. Bureaucracy would be different for all, but corporations might opt for one source for all for cost optimization.

Adventure! The thrill of the unknown! The challenge!

I stand corrected

Diaphraghm model? I thought all piston 1st stages would be open?

Some of us are solo or part time solo divers. We enjoy the submerged world alone. It's great but it also requires a bit more caution. You would benefit from a dive buddy but unless you can find one, and you must dive, go to the solo divers forum. Now that you are a new diver, it would be very...

The Scubapro is a piston reg and not optimal for extreme cold. As far as I know, the same is true for Atomic. Correct me if I'm wrong. Atomic is a titanium reg, thus lighter and better for air travel.

I fear you might be comparing sea salt to rock salt. Minor differences. All modern approved regs perform to a set standard. I have used 5 types of breathing apparata: 1. Apeks regulators. Great regulators. I tuned the cracking pressure up to make them free flow a bit less. I like the fact that...

I want two independent sources of air on shallow solo dives. I dive in cold water and I do not want to abort dives when a regulator decides to free-flow. Another reason is that I might forget to monitor my air - this has happened at least once (yes, I do make mistakes). You might not need an...

Confined space, lovely.

A lot of excellent advice is given above. Take your time, relax, do not swim too fast, find a position where you can comfortably rest in the water (this means that you are neutrally boyant and truly horizontal), calm your mind, breathe normally and forget about air consumption rate (monitor...

I went to Yucatan a long time ago. Rented a car. Chichen Itza was great. Hilario's well (Hidden worlds) was an unforgettable snorkeling experience (it's a cave). Traveling to Calakmul (it's far away) might also be inspiring, if you're adventurous. Lots of exciting ruins in the area and Rio Bec...

Not speaking on the surface might also be a sign of distress...

Only the better ones have audible and tactile warnings ;)

And hey, one good thing about sidemount is that when you forget to change regs regularly at 150 feet and you run out of gas in one cylinder, a very stupid thing to do, I did it, then you have at least another one to do the ascent.

I have been diving to 154 feet on air, sidemount, 3 feet visibility, overhead, total darkness. The amount of gas narcosis is significant. Only a Gopro can recall your dive - unless something truly traumatic happens. Warning beeps from your dive computer will get registered... sometime... later...

>>removed/old thread<<

While the surface volume (suunto) is pressure (in atmospheres) times actual volume, plus some coefficient to convert between US and metric systems (psi vs. bar/atm and cf vs. litres), compressibility may be taken into account too. Pressure and amount of gas are no longer linearly dependent when...

54 and got certified at 40. I wanted to become a diver in my teens, after watching Cousteaus films, but my parents could no afford it. And then I had studies, work etc. Diving had to wait for a quarter of a century.