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  1. *dave*

    Ambient pressure booster?

    Last year I built and installed an ambient pressure booster onto our RIX 4VX 24CFM compressor intake, effectively doubling the compressor's output to 48CFM. Now, I'm in the process of valuing assets and am looking for a price on a commercially available equivalent. My Google FU must be weak...
  2. *dave*

    Can your jacket do this?

    This is a quick clip of a try scuba I recently conducted for an exceptionally robust gentleman interested in becoming certified. fxsKlZ_87xA We certainly had no jacket that would fit, but I told him to come in the next day and we'd spend some time getting him fitted for a BP/W. Since the only...
  3. *dave*

    Name that contaminant

    These are pics of valves removed from cylinders for VIS. They had only been filled at two locations, so the source of contamination was pretty easy to track. I assume it's filtration medium, but unsure of its exact composition. It's extremely fine and has no taste or odor. What is it?
  4. *dave*

    Breathing and buoyancy

    I started using this video during my last class and found it generated some good discussion, so thought I'd post it here. I run the video prior to the fourth pool session and set it up by asking the class what would happen to a neutrally buoyant diver were they to have 8# of ballast added to...
  5. *dave*

    Sealife DC500 housing and WA lense

    Housing was flooded in fresh in a saline pool due to operator error.... I closed the lanyard that I used to connect the wide angle lense to the housing in the housing and flooded. The housing's integrity has not been compromised, just don't do the same thing I did. Includes: Housing Wide...
  6. *dave*

    Dive Training Magazine article on.... Dive training

    I ran into this article by Alex Brylske as I was clearing out the magazine rack in my reading room. Dive Training Editorials: THE LONG AND SHORT OF IT While I don't agree with his conclusion, I appreciated the article and in particular, this bit: Unfortunately, I don't believe doubling the...
  7. *dave*

    Left Routed Secondary

    Primary over the right shoulder and secondary over the left shoulder. I've seen a couple rigs configured this way now. When I've asked the divers using this configuration why, each has told me "that's how they told me to do it". "They" being their original LDS. In the absence of an acceptable...
  8. *dave*

    What skills did your instructor model?

    As an instructor, I've always felt that presenting a solid model for the students to follow was part of the job. A big part of that is modeling trim, buoyancy control and efficient finning technique. This video was shot a few years ago during the third pool session and I use it as a demo of the...
  9. *dave*

    The Other State of Diving

    Along with the vid I made to highlight common bad diving practices, I also plan on using this vid to demonstrate the level of skill students should posses after certification. This vid will be followed up with 5thD type demos. Most of the clips were shot during the nav dive for OW...
  10. *dave*

    The State of Diving

    I put this video together from clips from the DVD we bought after a two tank Cancun dive. I'll be using it in my OW class to demonstrate poor trim, buoyancy control, situational awareness, dangling gear, hand sculling and finning technique. I don't dive with many groups I'm not familiar with...
  11. *dave*

    YOUR OW course: What would you have changed?

    If there were one thing you could have changed about your OW certification course, what would it be? Would you make it shorter, longer, more intense, easier,.......? Are there skills you would have liked to have had instruction on? What would you have changed?
  12. *dave*

    Hi, it's your instructor calling....

    You remember me, right? At the end of your OW class, remember me telling you one of my greatest pleasures in diving is the opportunity to dive and mentor my former students? I remember you mentioning how much there was to learn in this sport and how eager you were to learn. I gave you my...
  13. *dave*

    Would you share your PDC data?

    If there was an option in your dive log software which would enable you to anonymously download your profiles to a central database, would you? The purpose of the database would be to compile data and provide general statistics. If your answer is no, would you mind stating why not?
  14. *dave*

    Suggestion Splitting threads

    http://www.scubaboard.com/forums/pub/309078-conspiracy-theories-pron.html This thread was apparently split from another. I believe the original was in site support, but I'm not sure. I didn't start the thread and there's no indication it was split from another. It just looks like I started some...
  15. *dave*

    Is more better?

    Lot's of buzz in the latest threads on the state of instruction and it caused me to consider the root cause. More now than ever, I believe the priority has shifted from producing independent, capable divers to producing as many as is possible. Besides the agencies, gear retailers and...
  16. *dave*

    Proper use of the English language

    Okay, explain how this works. 1 "We have got too many commas." 2 "We've got too many commas." 3 "We have too many commas." 4 "We've too many commas." 3 and 4 seem correct, but 1 and 2 are really the same and more commonly used by everyone from the pres to journalists. We've, I've and you've
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