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This was my first bottom timer when I was just getting started. I really enjoyed my Helix DM! It got me from Open Water, all the way through Cave 1. It died on me one day, and I replaced it with an Uwatec 330, but not a dive goes by that I don't miss the Helix DM :(

Is this considered a dynamic o-ring? I ask, because the only 75 durometer o-rings I've used have been the 003 rings on a high-pressure spindle. Those are dynamic o-rings and have to be lubricated. Most of the low pressure o-rings I've used (such as the 011 o-ring the male end of a low-pressure...

I know this must have been asked & answered once before. But, a search returned only irrelevant threads so ... here goes: Does anyone here know the durometer and the dimensions of the little o-ring that is hidden inside the female end of a standard low-preassure hose (pictured below?) And do...

I have four 4# pounds that I want to trade for smaller weights. Specifically, I need at least two 3# weights (coated, uncoated, hard, or soft.) If anyone is interested, please send me a PM. Thanks!

'Safe' is a funny word. Imagine ... Four rock climbiners walk into a bar: Abe, Blake, Chris, and Dave. Dave thinks free solo climbing is 'safe,' but Chris disagrees. Chris thinks free solo climbing is dangerous, but traditional climbing is 'safe'. Blake thinks traditional climbing is dangerous...

Bingo.

Were we in the same course? ;)

I've heard from one person interested in moving the class to Labor Day weekend. This is a good option. If anyone else in Houston is interested in taking GUE Fundamentals over Labor Day (August 31 - September 2) weekend, please contact me directly at the following address

I believe this is a unique opportunity for Texas divers to experience this kind of training at an affordable cost. The price includes the instructors fee, instructor's expenses, students's expenses (including pool time, doubles, fills, and entrance fees), and lunch. A similar course in San...

We have arranged a GUE Fundamentals in Houston, Texas in the Texas Medical Center. The cost is $699 per person, which includes tuition, expenses, and a catered lunch. A limited amount of loaner equipment is available. We will meet 08:00 on Friday, 19 July 2013 at UTHealth Recreation Center...

So the solution is to Dive Into Fiscal Fitness®? In a healthy market, when demand drops relative to supply, prices drop to create demand. Mme Antoinette would find out the hard way that an unhealthy market is difficult ..... to swallow .....

Those do look very, very cool. Gideon recommended I check them out when I replace my Whites. Hopefully I will have the chance to test one this July.

Correct. My point was that the system as a whole (high-pressure vessel, whip, and low-pressure vessel) does not experience a change in energy, if the system is adequately insulated from the atmosphere. Due to the increase in volume between the first state and final state of the gas, the final...

No, I mean ... what does Queen have to do with kinetic theory?

I'm confused.

You touch on an interesting point. An important concept to realize is that temperature is not a measure of energy; rather, heat is a measure of energy. Temperature is a measure of the rate-of-transfer of energy (heat, light, etc) between two media. In the example of transfilling gas from a...

You are correct in that the physiology of a dry dive and a wet dive are quite different. Inpatient hyperbaric oxygen therapy (HBOT) is routinely administered as high as 3.0 ATA. This is most safely provided at a multilock multiplace facility, where staff are better equipped to prevent seizures...

I pursued cave training for similar reasons. I had a passing interest in caves, but my first purpose was to prepare for overhead penetrations of wrecks and artificial reefs. I was shocked to find that cave penetration is much safer than wreck penetration. In fact, I now believe that I am not yet...

Unfortunately, we are in agreement when it comes to that.

I've heard the shore diving off Bonaire is incredible! Answer ABSOLUTLEY I think I would much prefer to dive from shore all week, and not off the boat. Is there any chance we could make an option that does not inlcude boat dives, but includes unlimited shore diving? Answer NO This is a group...