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Nice work!

Negative. The water will (nearly) instantly wick/penetrate back through the cabling and flood your light head and battery canister. You can seal the cable ends with potting epoxy or potting silicon which *may* prevent the lighthead or battery canister from leaking in from the cable.

They were a response to the "best mix" nonsense of the 1990s and early 2000s. (which lingers today but most of us appreciate there's a better way)

Washington State itself is a cave desert. We have a tiny sliver of limestone at Snoqualmie Pass and another sliver outside the town of Concrete (the name is a hint lol). Otherwise it's 99% lava tubes in the Mount Saint Helens / Mount Adams area closer to Portland, OR. None of those are...

The times I used 25/25 in FL I started with a richer mix in deeper systems and then topped with 32 to water it down for Ginnie dives later in the week. Up here 25/25 knocks the edge off tiny, dark, 4C caves down to 110-120ft although only >90ft ish if its friendly (large ish, silt free) at...

The few 90m dives I have done I appreciated the lower O2 in 10/70 and shallower END too - with some decent dil flushing capability. But I don't do those enough to really have a standard.

AN/DP was a requirement for my MOD1 and I am appalled it's not universally required for CCR. You're using 100% and mixing on your back and its actually quite possible to dive a nitrogen generating machine (I don't know word for a worse than air EAD).

Yeah I can swim all the way to mainland and spend 2 hours back there and have basically 35mins of (50/70 GF) deco on 25/25 and Sp of 1.2. 90 minutes is crazy amounts of deco for anything exit side of the Hinkle

My only "yeah no thank you if I can avoid it" is 10/50. I've been on a charter that banked 10/50 though and in a when in Rome spirit I rolled with it. It's ok down to 200ft ish but really works the solenoid like crazy and its way too light on helium for anything deeper the 200ft for me.

32% down to 100ft 25/25 caves or down to 120-130 18/45 the universal dil down to 200 deeper than 180 is 15/55 down to around 250ft where the deco to value ratio ceases to be fun

Because Goodyear was eager to "donate" the tires now. And a whole lot of non-scientists, local fishers, mayors and divers were behind it. Actually consulting a fisheries or coral reef biologist probably would have gotten a "we're not sure but fish like structure so maybe???" Goodyear and crew...

Wetsuit or drysuit? Bootie type and thickness? what size feet?

I feel attacked :p Although out of all the diaphragm regs out there I would definitely steer towards Deep6 over Xeagles and DGX. Apex I am on the fence about since I already own a bunch of those.

He was one of the original ~12 UTD instructor corps along with some local buddies of mine. He has a lot of good passion for Great Lakes and cold water diving in general. Plus two+ decades of teaching experience in cold water. You couldn't ask for a better cold water transition. I have no...

What kind of light? The EO is a worldwide standard even if a bit primitive and they don't last especially long.

People travel to dive places - including the Great Lakes, for training, for conferences, and for trade shows. I've known James since UTD was founded in 2006 or 7 ish

If you're planning on doing addition training with James Mott he's great, can recommend

I totally know what sealed and unsealed regs are. And sealed regs don't really stay pristine like you'd think. In fact they often trap water/humidity inside and have additional failure modes that unsealed pistons don't have. "Sealed" pistons are not really sealed just packed with grease -...

My top 5 for OW and AOW - these were one course in the past and both are more or less required to get the depth and breath of skill proficiency to be well rounded: Clearing your mask easily Face submerged & not breathing through your nose Neutral buoyancy off the bottom Horizontal trim Being...

The seal doesn't really do this in practice. The reality is that some tiny fraction of a drop of water is injected into the 1st stage when putting the reg on or from fill station providing a wet fill etc. And the internals of a sealed reg more often than not look similar to an unsealed reg at...