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Interesting. I did a bit of a search and "parafine" seems to be a trade name of a chemical made from silk protein based amino acid compound and aqueous polyurethane. It seems to be used for treating fabrics and in skin care products. It also has water absorbent properties. No mention of Scuba...

I think a lot depends upon what your body is acclimatized to and what KIND of wetsuit you wear. I wear a 7mil Farmer John style so I have 14mil over much of my core. I'm quite comfy in mid-30s water and suspect I would be OK with a 5 mil version in mid-40's water. However, I don't know that I...

Good tip, and one I use when surfacing with no visual reference. Unfortunately in this specific case I was swimming down, looking for the bottom, and couldn't see the bubbles.

:rofl: It's the time difference kicking in. Either you need to get up earlier in the morning or I need to get to bed on time. Or did my Sensei mean to say he knew how I identified it...? :japanese:

That may be a provincial jurisdictional issue, because my understanding of the law in Ontario is different. Except for cases of suspected child abuse and other isolated exceptions, no one acting as a private citizen is required to take action on becoming aware of another in need of assistance...

I find after diving the earwax forms a plug, retaining water and muffling my hearing. I have always had good success with plain warm water and a large syringe, as suggested by my doctor years ago. I hold my head over the sink, ear down, and irrigate vigourously several times. Little chunks come...

I know about that one. I keep one eye on the compass to ensure a reasonably straight line while I'm swimming along. Otherwise I slowly circle left. But could that cause me to spiral like that? Most stuff was safely tucked away in pockets. Octo was in a holder, light in right hand (pistol...

It looks like a Sherwood SRB3205.

I went for my first dive of the season today. Water temperature was 37°F so I was wearing lots of neoprene and perhaps I personally gained some bouyancy over the winter months to boot. The net result is that at about 1500psi, I discovered there was no more air left in the BC. As the bottom...

There is a third way to win: If your act of stupidity results in the death or sterilization of your offspring. So if the lady in the original story had dropped the baby into waiting jaws, she would be eligible.

Sometimes things go wrong, through nobody's fault. Gauges can stick. Things can get busy. That is why firefighters have such warning devices -- because while trained to check the pressure regularly, sometimes things happen. Firefighters are just as concerned or more so than scuba divers...

Unfortunately, that would not be diving within the limits of my training. I am trained and certified to dive to 100 feet on air, not nitrox. Many agencies teach diving to 100' on air, so I think the scenario is valid. Depending on what exactly was entangled, it might be possible to ditch the...

Actually, the original question is an interesting one. Let's change the circumstances slightly, keeping the scenario within a properly planned recreational dive: We are engaged in a hypothetical dive at a maximum depth of 100'. Approaching our planned NDL of 17 minutes, I have 1400psi...

Sounds like a worthwhile excercise, too bad I'm working that day. One question: What kind of wetsuit do you recommend for water 36° to 50° Celcius? Would I be too hot in a 7 mil FJ? I've never dove in water that warm (water temps around here are still only 2°C or so) :rofl:

:rofl: Well, it's a plan. Maybe not a good plan or a responsible plan, but it's a plan... :rofl:

I understood PairofMedics' post to be an example of how medical knowledge has grown. In other words, even a paramedic of today knows more than a doctor of yesteryear. I believe the implication was that a doctor of today is lightyears ahead of the turn-of-the-century doctor. I didn't think he...

Anyone have any idea how the old NASDS open water fits into all this? The limit is (was?) 100'. Is that recognized or is OW = OW regardless of agency?

You can use a jigsaw/scrollsaw/bandsaw with a medium tooth at a speed low enough to prevent melting. Drill a hole with an ordinary steel drill bit in the off-cut for a starting point for the blade and work outward to the desired line of cut. You can finish the edges with sandpaper (dremel tool...

Actually, we are doing it now at work. For the last 6 or 8 years, we were part of a North American study werein our objective was to shock as quickly as possible. CPR was delayed until we had completed a stack of 3 or 1 NSA. Other cities were using a CPR-weighted protocol as part of the same...

Do you mean one of those ones with the aerosol can of air? Is that really a good thing to be taking down with you?