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Yellowstone Lake itself is monumentally boring. I love the park but the lake itself is a "one and done". Vis was ok-ish, just very little to see. Are you looking for strictly recreational dives? Are you deco or cave trained?

More like actually finding the wreck (at most). The class portion is mostly how to hold it, lay out line over a featureless bottom without it bird's nesting. And serve as a reference to either finding a wreck and/or returning to a shot line in a non-overheard situation. It's not intended to...

Yeah I'm not a fan of "just" bringing stages if I can help it. You end up with less gas on you and your total volume is scattered around in little nuggets which aren't immediately accessible. I am more of a RB80 like BO person when possible - put the largest tanks you can on your person and only...

At 2500ft elevation yeah it's going to be frosty down there. On the plus side it was historically stocked and those trout are now resident. Although seeing more than a fleeting glance is unlikely

Silty boring bottom with occasional logs. It was formed by a lahar. I am not sure what geological features you're expecting at the scuba scale even if the vis is great - which would be 100ft like in Lake Cresent - which is also pretty cold and boring apart from a few deep wrecks and some loggy...

If you own the tanks and want to "try them" just fill them e.g 1600psi full with EAN32%. That simulates 15/55 gas pretty well. Consider the helium fraction as weightless and you're going to be close tank trim wise. I don't have 104s but I have used both 108s and now 130s SM with 15/55 and I...

I would do T1 first. You can practice those skills locally much easier both before and after class. Then a year after T1 you'll have a broader & more familiar base to build on once you travel for a class which then has legit time pressure feels on it. C1 will feel much easier with T1 and ~30-50...

This is ridiculously high for a brand new cell and there is no way a 7% deviation from expected mV at 1.0 is anything close to linear at 3.5 I am now wondering what exactly are you considering linear at 3.5bar?

You're more likely to have the battery run out than outright fail.

Honestly if you are traveling and the reg fails you'll be renting the rest of your trip - unless you brought your own spare which is a bunch of luggage weight for a really remote failure. I think most of us would pass on having any old random shop monkey work on our regs, and that's assuming...

Shrugs, it's not referenced to anything other than ambient. They are not designed to be brought to outer space, the face oring will fail and the face will pop off.

Same. You really only need two signals. Q: "Move up?" If yes affirm with move up signal If no then decline with stop here, pinkie, time signal A: "I am Z more minutes here" If Yes and you all moved then Q: "Stop here, I am X minutes here" A: "I am Y minutes here"

Bourdon tube gauges measure gauge pressure. They read zero at the surface, whether that surface is the bottom of the Marianna trench or outer space. If the gauge is not attached to a tank and taken to a different pressure it still reads zero. The little (usually copper) tube in there has no...

Definitely not the neutral 80s. 3300 psi fills are super annoying (you won't often get one) and the tanks are too heavy. Also resale value is terrible. Just put a V or tail weight on regular al80s

Every galvanic cell ever made will lose linearity at 3.5 at some time, some won't even get there new out of the box. That tells you nothing about it's fitness for use below 2.0.

If the cell is linear at 2 and non-linear at 3 bar that cell is fine. Testing way up at 3.5 bar is not useful information.

Huh? You had to tow the spare scooter on the way in, it makes no sense that towing it on the exit will be radically slower just because it's failed. Unless its flooded or something else is going on. A silt out isn't unique to OC or a scooter either. Like no kidding - 1/3rds is super...

We aren't all diving Ginnie - sometimes swimming out is actually impossible. When you "must" scooter out you can rely on being towed (with the right buddy/scooter/cave) and/or bring backup scooter(s). The swimming gas consumption isn't relevant anymore.

The battery is not the limiting factor failure mode anymore compared to SLA scooters of yesteryear (apart from something like the Seacraft GO). Trigger switches, props and other less "minutes runtime" based factors are the limitations. Scooters can and will still fail. Backup scooters and...

Yes it's fine on wetsuits