I just read over this whole thread, linked from elsewhere, and I don't see limeyx's comment as a "personal attack". Saying
DandyDon you have no clue about (whatever) would be a personal attack. Limeyx was stating a fact: Rock Bottom is not turn pressure. Rock Bottom is the absolute minimum gas required to get you and an OOA buddy back to the surface, completing all stops (required and safety), from the deepest/furthest point of your dive. Thus if you "turned" at Rock Bottom, you've already gone way past the gas you were going to need for the return trip, and you are now on contincency (emergency) gas!
Although not nearly as in depth as I had in my DIR-F class (no I didn't get a full pass, and no I'm not preaching here) my
Basic OW instructor summed it up nicely when he said: "So you want to get back on the boat with 500 psi. That's nice. You're planning to dive to 80' in a current - when do you start heading back? What if the current shifts or something happens? Do you now have enough gas?"
DandyDon mentioned using "thirds" as a gas management technique. Thirds, as explained in the Cavern course book, was long considered to be "adequate" as far as providing enough of a safety in case things awry in calm (non-current) conditions, in Open Water. However there are cases, diving in current or being cold/narced/task-loaded being some of them, where your "return third" is now
not enough for you to return to your start point without dipping into your "emergency third". Then if you have a true emergency, the "emergency third" is not adequate.... you can see the snowball forming.
I realize this thread is over a year old and I hope that Dandy has had a chance to speak/dive with/learn from other divers - not just get pounded for his planning skills or perceived lack thereof, or choice of gear - but truly shown alternatives and given an opportunity to decide whether or not they might be prefereable to his previous methods. (I won't even put in the requisite plug for sitting in on a DIR-F class
although any DIR instructor would be happy to give out some pointers that would go a looooooong way toward nipping in the bud some of the cascading events seen in this thread.)
The only criticism I have for Dandy was that if you dive as a Solo diver, you need to be
completely able to rescue yourself from the worst possible situation happening at the worst possible time. Running to the nearest team should never be acceptable. And planning on hitting the surface and hoping, should not be either.
Solo diving is a tremendous responsibility in that you are relying utterly on yourself (and your equipment) to solve your problems
on the bottom.
Sorry this got so long. I couldn't help but comment.
Dandy, let us know how you're doing on these points lately - what have you changed in this intervening year?