Hi Mark,fins:???
I've been taught (by a GUE instructor) that the backup light snap should face in and all others should face out. This is done so that in the event of a primary light failure (and a zero vis situation) that you can find your backup light by feel. If all snaps are facing the same direction how do you know which is your backup light?
The actual reason for my recommendation was that it made life a bit simpler during a gas switch. When the primary 2nd stage, the primary light, and the back up light clips are all on the same d-ring, it can get a bit crowded. I have accidentily unclipped my backup light or my primary light instead of that primary reg when I was switching from a stage to back gas. Not a big deal, but annoying after I did it a few times. So I have just made it a habit to turn the backup light clips in and the others out, I also clip my primary 2nd stage to the "outside" of the backup light and my primary light clip is on the "inside" of the backup light clip. Is this by any means something that is "DIR"? I doubt it. Has it eliminated this small/non issue? Yes. It really isn't that big of a deal and please do not construe any of this as some kind of "DIR" method. When it comes to this area of clipping boltsnaps, if it works for you...more power to you.
I know all the instructors I have been "taught by" or "teach with" say the same thing in that there is no "DIR" clipping methodology. Whatever works for you is fine. But I do feel that students are paying the instructor not only to teach them the "book" material, but also for their experience. When I took my first cave course (as well as my 1st scuba trimix course), in regard to gear config. and choice, the instructors (different instructors) each told me to "do whatever works for you"...well I could've stayed at home and did that. I mean, I was paying to learn the how and why behind this stuff. I don't really believe that I should have to pay someone to tell me to "do whatever works for you". I was looking for techniques and protocol and the reasons behind them. So when students ask questions regarding aspects of diving that actually do fall under the "do what works for you" answers, I prefer to also add that "I do such and such....and the reasons I do it this way are because..."
Finding the backup light clip by feel for the lights out was related to the same points I made when I was speaking about finding the primary during the gas switch. Of course in the event of a primary light failure, our protocol is to keep the light clipped to the d-ring, turn it on, then unclip (if necessary)...again, not a big deal, especially in this scenario.
I hope that clears this up a bit, Mark. As always, don't ever hesitate to get in touch w/me if questions arise or something is vague or doesn't make sense....I am very happy to continue your brainwashing and assymilation to the dark side....next week is "sleep deprivation week"...are you in? In the past, this has been the point where we really reel 'em in to DIR...we also show diving movies w/subliminal "Halcyon" and "GUE" messages added that really put you over the edge...once you're in there's no turning back!! (for those w/o a sense of humor...I'm only kidding......)
dive safe!---brando