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Naively, let's say you set a Deco setpoint of 1.5 on a computer that's programmed to inject O2 via solenoid when PO2 falls below 1.5. At 20 feet everything is fine and reaches a steady state, but now you ascend to 11' (chosen for easier math). First, the solenoid can only add O2, it can't pull...

What are the High/Deco values, what's the FO2 limit set on your computer, and what's the PO2 you're having to drive up from? FO2 limit is under menu - setup - setpoints - FO2 limit. Mine's set for 90%, which acts as the upper limit that the solenoid should drive the unit to. So if the...

Certainly decreased loop volume shouldn't be relied on, but if you notice the loop volume has dropped without a corresponding change in depth it's definitely a good call to immediately check ppo2/fo2. As for not buying the argument, what would stop you from noticing that there's insufficient...

Procedurally if an instructor has enough dives to self-certify is that something that they have to go through a procedure on, whether via the agency, making a note in their logbook, or by other means? Or at some number of dives can they simply sign off on certs via self-certification without...

I agree with almost everything said here. The challenge is it doesn't actually address what I've said.

@wetb4igetinthewater I don't think selection up or down of a pound makes much difference, even if placement for trim does. However, discussing this as a static weighting difference ignores that this is a dynamic issue. More displaced water means lungs can compensate for less depth change...

Altitude certainly takes a backseat to many other factors, and if the site happened to have been at sea level that would not have broken the incident chain. Another one that I don't think changes the outcome is the remoteness of the site from communication or medical aid. I think it does...

I'm entirely with you on the first two paragraphs, I believe they are in line with what I suggested. I don't think liters displacement on a one-liter basis is the best way to conceptualize for the circumstances described, however. 1L of water is 2.2 pounds apparently (If a slightly different...

1) Their point is poorly expressed. The way that I can read it and make it true / make sense is that the change in pressure is higher per foot of depth. Imagine a neutrally buoyant diver at 2 ffw who descends to 10 feet without compensating in any airspace. On the back of a paper napkin I...

I think I've got it! QC6 LM Body 9/16-18 M 9/16-18 Female to 3/8-24 Female $10 DGX Adapter: Turns LP Reg Hose into BC Inflator Hose $10 That last part arrives as 9/16-18 M to BC, but that's actually a removable adaptor. Take it off and you get a 3/8" male for screwing into a first stage LP...

Yeah, that's straightforward and about what I saw with a stock 1/4 NPT although I was looking at slightly different approach: DGX Adapter: Turns LP Reg Hose into BC Inflator Hose isn't flexible, but it's cheaper and shorter (it comes apart to give the right thread). Another approach I see is...

Do you have a picture of this, or a link to the parts? I found fittings for this for a stock QC6, but am having a hard time finding a F-F 9/16-18 connector for a LM machine QC6 (M-M is trivial to find).

Fair enough! I've also been warned that gear tends to get funky when you've been out for a week... ---------- Post added September 23rd, 2013 at 07:39 PM ---------- Very nice, looks much harder to knock/bump over than the X-table I dove from.

I'll second the reliability of Toyotas. Everyone I know dives from truck tailgates and I don't think I've ever seen a diver working from a van. That being said, it seems like they actually have the potential to be amazing dive vehicles. No well in the trunk, AWD possible, space to sleep if...

My experience has been that even after you've moved gear onto them they're easy to knock over while gearing up, especially on rough quarry roads (that's after you've wrastled your gear onto them). Should I assume that I was doing it wrong and just had a bad experience? ---------- Post added...

I'm thikning aobut upgrading my divemobile from a well-used 4-door sedan to a new(er) vehicle. It seems like a truck is the gold standard for getting doubles on and off directly from the vehicle, but I'm wondering what other types work well, especially with other benefits? For instance, in a...