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What's the deal with deep air?

The main caveat to ratio deco is that the associated obligations are linearly proportional to bottom time, thus for long exposures it goes way out of scale with prevailing algorithms. There is no saturation in RD; instead there is a concept of max deco (which is roughly the same concept). In my...

Sorry - just viewed this on my computer. FYI, when I use TapATalk from my phone, moderator comments are illegible.

If I demand a safety stop, am I now on a deco/technical dive? Maybe so. At some point, it's all personal choice. What model I elect to use and whether I elect to modify it (e.g. gradient factors) are personal choices. Same story for whether I elect to add deep or shallow stops to what the...

At the risk of getting more "off topic" posts deleted... :D What's the profile? 90 feet for 40 minutes on EAN32? Personally, I'd consider it an MDL dive (I use 40 as the limit for 90 feet on EAN32), and do about 6 minutes of in water deco (2 minutes to 40 and 4 minutes to surface). (Note that...

It's analogous to "NDL dive." An MDL ("minimum deco limit") is the time limit at (average bottom) depth for which the following generic ascent strategy applies: 30fpm to 1/2 depth, 10fpm up from there (usually 30 second stops and 30 second moves at each 10 foot increment). GUE (and UTD)...

I believe it was started here.

You forgot the huge bold typeface for the word "if." That scenario doesn't reconcile with either the OP or Lora's email. Unless both are lying (which makes little sense), the crew didn't know they were off the wreck. Furthermore, they admit to being unhappy with their performance, but are...

To me it's not that they left them bobbing for 27 minutes, it's that they didn't realize they'd drifted away from divers. If they were picking up a group and knew that S+N were planted on the buoy, great. But it appears that the crew didn't even know that the boat wasn't on the wreck (as...

Some? Everyone who has read this thread knows that for certain. DIR isn't a gear configuration, but a gear configuration is part of DIR. A key part of that configuration facilitates expeditious, passive gas sharing, hence two second stages (neither being an in-line system like the Air2) are...

I have, but don't recall any specific impressions. I too like Anita and Carl, even with the accompanying ribbing I get for diving open circuit. :P

This should probably be added to the What Is DIR sticky.

I'd not be surprised. After hearing about another friend's group having their anchor dragged for *miles* and eventually getting picked up by a passing fisherman because the captain was busy banging the deck hand, I'll believe anything.

I can accept a good thought process (like yours), and I can accept a mistake when admitted to. But it's fairly clear from the 'If they’re going to do this long of a dive, they really should let us know beforehand' comment that ligersandtions' and xstephenx's experience wasn't the result of...

Simply amazing hearing the entire story rather than bits and pieces. I'm so grateful you kept your wits about you and hung onto the mooring line - I doubt they'd have found you in conditions like that otherwise. It's probably not worth your time pursuing the gift certificate matter, but that's...

Halcyon formed because nobody at the time was making the gear these guys needed without DIY modifications. "Tech" gear was available, but not the right gear for WKPP.

Let's be real. One can not claim that any organization's gear configuration (or procedure or that matter) is far from minimalistic unless there is an objectively sound minimal set of gear for diving. While you may not believe a light is necessary, for example, to others it is a requisite item...

Wow - very sad. Condolences.

You don't need to give all seven. Hog routing tucks either underneath a light can or into the waist strap. If you don't untuck, you end up donating more like 3 (guestimate).

From this: I think many read that post as saying that because he opposes DIR, he won't use a plate or a long hose. I suspect a different interpretation may be what you meant: he is the antithesis of DIR because, among other things, he uses neither. On track?