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  1. DIR-Atlanta

    twinset valves

    Do you mean they will refuse to fill them to 300 bar, or refuse to fill them period?
  2. DIR-Atlanta

    Why the SPG is clipped to the hip ring.

    There have been several previous discussions on this topic - suggest you use the "search" function to find and read them. Here's a brief summary of the main reasons:Keeps the left D-ring from getting too cluttered.Keeps SPG from interfering with stage and deco bottles (when you start using...
  3. DIR-Atlanta

    DIR GUE and backup lights

    The parallel that I am really trying to draw is that in both cases the end state is reached via a flawed conclusion (namely that it is OK to overcome a skill deficiency by modifying the gear). The DIR gear config is built on the Law of Primacy and the premise that everything scales up, so...
  4. DIR-Atlanta

    DIR GUE and backup lights

    Unless it also fails, and you have to then go to the tertiary backup. I personally don't like to leave things dangling for any length of time. For deco situations further back in the cave, I will leave my primary light on and clipped, but once I am in the daylight zone (and if visibility is...
  5. DIR-Atlanta

    DIR GUE and backup lights

    With all due respect, the situations are exactly the same. It's basically a "deploy once" approach, with no thought given to how the gear will be restowed when it needs to be. "Back in the day", most people got by OK with hose stuffing because they were doing short dives just on their back...
  6. DIR-Atlanta

    DIR GUE and backup lights

    That's the same argument people used to use to defend hose stuffing, and it's just as specious in this instance as it was for that one. One of the key aspects of the DIR gear config is that it promotes a sort of muscle memory, which then leads to procedural consistency. To that end, you need...
  7. DIR-Atlanta

    What's the point of GUE Factors?

    The point is to try and make up for the shortcomings of the Imperial system of measurements.
  8. DIR-Atlanta

    Fundamentals or Fundies

    While it's certainly possible to do tech training in a non-BP configuration, I would argue that it is not optimal to do so. For example, I started my Full Cave class back in 1995 with a brand new (original) Transpac, which had just been introduced that year and was "all the rage" for cave and...
  9. DIR-Atlanta

    Would this be acceptable?

    That thing is a waste of money. It doesn't provide any real benefit over using the SL4 "as is", and adds multiple failure points on top of that. You won't ever be doing any Tech level dives with it, so whatever money you would spend on it now would be better applied toward the future purchase of...
  10. DIR-Atlanta

    Best bottom timer/computer

    I'm not sure why people feel that they should be able to "look down" to see their SPGs. That can cause problems with trim, and also with buddy and/or situational awareness. It also does not scale to other types of diving (night diving, cave diving, etc). The preferred method for checking the...
  11. DIR-Atlanta

    Best bottom timer/computer

    Not so far - it does have a much longer wrist strap to cut off. :D The boot is also a little lower profile than the older model.
  12. DIR-Atlanta

    Back-Up Torches

    One other potential issue with aluminum is oxidation, which could cause the threads to seize. Obviously that's more of a concern in salt water, but still something to think about. Also there is the possibility of galvanic action between the case and other internal metal parts, particularly...
  13. DIR-Atlanta

    Best bottom timer/computer

    Or one of your stage bottles.
  14. DIR-Atlanta

    Best bottom timer/computer

    I'll echo the comments in favor of the Uwatec BT and "just practice" on hip-clipping. I would not use a fixed ring anywhere, and especially not on the hip. It is not necessary, and mostly serves to overcome a (largely perceived) difficulty with clipping off - something that just takes a...
  15. DIR-Atlanta

    "S" Drills

    Or has had an equipment issue that prevents them from getting to the gas they have. Not all gas emergencies are the result of inattention on the part of the diver who is "out". With all due respect, I don't see that it should require a lot of practice to unclip a gauge and show it to someone...
  16. DIR-Atlanta

    "S" Drills

    If you plan the gas usage correctly and everybody follows the plan, then you already know you have enough gas for the exit. Checking the gauge won't show or confirm anything that you didn't already know before you started the dive, so there's no value to that step that I can see. If they ask...
  17. DIR-Atlanta

    2nd Stage regulators for Doubles

    With the exception of a couple of legacy Mk10s (which I just cannot bear to part with), yes I am using Mk25s for everything. Actually two of them started out as Mk20s but have been upgraded. The advantages are that everything is completely interchangeable with everything else, they're very...
  18. DIR-Atlanta

    2nd Stage regulators for Doubles

    You want the two second stages to be roughly equal in performance. In your cave class, you will probably spend as much time on your backup as your primary, so I would go ahead and get something comparable to the S600 you are using now. If you think the S600 is too complicated, then you might...
  19. DIR-Atlanta

    Is Diver Alert (Whistle on LP inflator) DIR?

    Don't forget that the boat captain and crew are also part of the team.
  20. DIR-Atlanta

    Which Yellow SMB to choose?

    I'm not sure I understand what the issue is. Why would you need to send up an SMB for lost deco gas? You should already have a contingency plan for that situation before you ever even start the dive - why not just follow that? Furthermore, you are diving in a team, right? Doesn't each person in...
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