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All I'm gonna say is that it better be a real emergency. God forbid that system gets used for anything else. If ops started using that for routine "time to end the first dive" stuff, I'd compelled to swim over and start drilling holes in the bottom of the boat. That's worse than a 2 a.m. car...

Surely we would have heard more about something like that. There were a lot of people and a lot of cell phones. I think it's a terrible product, but I find it hard to believe that we'd only have a bit of hearsay if someone actually lost consciousness during a pool demo.

Getting ripped off because the product is not delivered is probably the best outcome. At least you live. Better that actually receiving one and trying to dive it.

Yup, the LTZ has tri-glides and that plate weaves through them and rests on your back. Sorry I don't have an extra to sell, but it's well worth it. Good luck.

p.s. If you need to add a smidge of weight to make it negative, you can probably find something more useful that a fishing weight, like a double ended boltsnap or something. If you're going to add weight, make it something that you might need in a pinch. But, it should be possible to avoid...

Looks like video smuggled out of the Hydroid R&D lab.

Don't know that I've ever measured it, but I would say no more negative than you need to, well, make it negative. You don't want to sink like a rock, just hang down instead of float up. I assembled my rig and put it the pool hanging from a string and scale and went from there in picking my...

It's hard for me to judge based on the pictures of the thing. I'd love to see an actual unit disassembled - but I won't hold my breath. 6L's worth or counterlungs aren't as big as you think. The small ISC Minnows are 6L total and if the helmet were big enough, I guess I could see that...

I'd try to stay balanced if I could. Unbalanced rigs suck. IMHO, you want to be slightly negative so that the housing drops away from you, slowly, to hang on a tether if you need to drop it or have it out of the way. That's preferable, for me, to having it float up and be in the way when I'm...

i.e., they are full already but the viz has expired since the fill? If they've got gas in them, dive away.

As others note, it's rare. The best advice is to function check your regs before you leave on the trip, preferably with enough time to do something about it if you find a problem. I think regulators are like boats - they tend to develop problems when they aren't being used. That's when I've...

There is no question that if we were on a dive and things went sideways, your odds would be better listening to JC than to me in finding your way out of the wreck or whatever. But, we're not on a dive. We have the luxury to discuss, debate and examine the reasoning. This is particularly true...

That's not the comparison I made. 85/85 gets you out of the water in about the same time as 30/95, not 30/85 and I'd far rather get out with an 85 SurfGF rather than 95, even at the expense of deeper stops. That is particularly true as the science tends to be pointing us towards increasingly...

SurfGF simply shows the surfacing gradient of your leading tissue compartment if you were to surface at that moment. Whatever depth you're at, if SurfGF equals, say, 90, it means if you popped to the surface, your leading compartment would be at 90% of the M-value. GF99 is different. It is...

Mike, I think we're talking past one another. First, I'm not challenging any instructor's right to set any requirement they want, but I do think it's fair game debate the substantive merits of the requirement. Especially when the implication for those reading along at home is that this is some...

That's all true but, in practice, pointless, particularly given the fact that preferred GFLo values are creeping up these days anyway. If you need to expedite your exit, just ride the GF99 up at whatever GF you feel is appropriate. If you have the luxury of padding the last stop or two...

There are a million pro/con threads about braided vs rubber hoses and I don't want to ignite that debate or sidetrack this thread, so I'll just identify the arguments without taking a side. Some believe they are more failure prone when the inner lining crystallizes, particularly with some...

Except you really don't need to change your GF high to expedite your exit. Use GF99 and SurfGF.

Too thin in my opinion. I use 300#, which is more like 1mm. That's plenty thin to about double the capacity of my spool compared to typical #24 cave line. Even at 1mm, it's already thin enough that you need to exercise extra care about not getting line cuts on your hands during deployment...

But diving is not driving a car and the consequences of a breakdown are more severe. For Joe Average Diver, planning around mean time between failures is not of much comfort. We're not trying to optimize fleet maintenance. Plan around the dumbest driver. It's life support equipment. Part...