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Ironically, while looking up the color blindness options for Shearwater, I found this SB thread on the topic: Color Blind Divers? Very interesting as it perfectly describe the issue I have, and also Shearwater's partial solution to it. I say partial because toggling the same color (red)...

I will download the Petrel manual and check that out. A color corrected Petrel with haptic feedback and a NERD might make the color blind issue a moot point.

I'm definitely interested in the NERD, but have only played with one on display and had some issue getting the eye-relief just right (maybe this is less sensitive underwater?). Otherwise I really like the concept, especially as a photographer with occupied hands. The Defender I tried wouldn't...

After getting to do a try-dive on a Defender I ran into one issue (besides buoyancy) that I hadn't expected. It was sunny (Roatan) and I was very shallow and hadn't realized my mask had a slight fog inside, but I suddenly couldn't read my PPO2. The rest of the console looked fine, but where...

Agreed. I'm in Roatan right now, and four days in on OC my voice is getting raspy. Happens every time.

That sounds awesome. I would have loved to spend longer on the unit, but it was more of a demo.

I'm looking forward to that, and keep telling myself how much I'll be saving on helium :D (fuzzy math ftw!)

Hi all, This is mostly a shout-out to all the people who have answered (tolerated) my numerous beginner questions, it's really appreciated. By semi-random coincidence I was able to try out a Defender in confined water today--it was eye opening, both in terms of cementing my intention to to...

The Protec website mentions the Revo, but maybe it's out of date info? I know they love their 'winder, but I have reason to think it's both a lousy first unit, and not ideal for boat diving, so I'm pretty much ruling it out. Great to know about Kelvin, hopefully he and Protec are still on good...

ProTec has most of those available at their shop (Fathom isn't listed), as well as the Revo, and I've had good experiences working with them in the past. My plan now is to head down there as soon as I can, talk about the different models in person, pick one for MOD1, then do test dives on the...

I see you are in the UK, so I'm guessing the water runs about the same as the 9-14C I get here. Assuming you dive locally, do you use the axial or radial scrubbers? In my mind, simplicity is a great asset when no real sacrifices are made (part of why my car is a manual.) So is redundancy...

That one is on my list as well and was actually at the top before Leon moved to Texas. Before that ISC was an hour from my house... Just curious, have you ever heard of putting a leaky valve on one? Or does the design make that untenable?

I have an authorized repair shop a few hours away, and was actually going to call them later today regarding what to expect for maintenance costs. If the Fathom had a hybrid option I'd be giving it a really hard look, but I believe the whole point of the Fathom is that it's a dirt simple...

I wasn't thinking it was threaded per say, but was wondering if it was fussy about tightening. I've come across warping issues with face seals in some instances (non-diving) where there was a narrow zone between loose/leaking and over-tightened (warped) leaking. Sounds like this is not at...

This is surprising to me; I would think the position of the lungs would be at their best in those orientations since they and the divers lungs would be in the same water column depth. It seems my intuition was wrong. Agreed. Since it's my boat I can always get back in the water once the issue...

Great info. So, short of swimming on my back (no real reason to), the sorb will stay dry? So the lack of a CL water trap in the Revo is mitigated by the design topology. Do you find the (comparatively) oversized cover to be difficult to properly seat? I know from some pond plumbing projects...

I've been digging through some older threads here and came across it as a concern. Also agree that if I go the CCR route, I'll be bailing the moment I suspect the loop might be compromised, but if I can choose a unit helps mitigate the issue, that's of interest to be sure. Since there's no...

Again, thanks to all the detailed threads here, I stumbled across a potential issue with the Revo, and perhaps BMCL's in general that's a big deal to me--caustic cocktail when going in to a head-down position. As mentioned, my primary reason for diving is macro photography, and for me that...

Thanks again to all who've chimed in--I think I have a rough idea of where I'm heading now, but have a lot of ground to cover. I also appreciate your patience with an aspiring CCR diver as there isn't any other place I've found to ask these sorts of questions. Cheers, -Michael

Good point. My focus is definitely macro photography (I may spend 15 minutes in one spot.) Most of my dives are limited by gas and may run 90min. I've also read that it's easier to stay warm with a CCR due to the loop's warm air, which would be nice.