How much gas in case of accidental deco.

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Sure one can take bits and pieces of anything and find benefit in a different arena, I do that all the time; but rarely does wholesale transplanting between two fields work out optimally.

Ever seen someone shifting up and down the gears, drafting and switching lanes back and forth in commuter traffic
Ever seen someone in skins and a helmet ripping through a crowd on a resort ski hill
Ever see someone duck hunting acting like they are running down Bin Laden
Ever seen someone on a rec dive looking and acting like they are dropping onto the Andrea Doria.

DevonDiver said: I get the impression that DIR focused agencies absolutely assume that divers will eventually progress to technical/cave diving - which is probably true for them, given the demographic they attract. In contrast, non-DIR agencies don't make any assumptions about the student's ultimate goals or the inevitability of progression to tekkie status.

Absolutely. Now, seeing that the vast majority of rec divers come out of non DIR agencies it would take wishful dreaming or social engineering to expect DIR strategies to work well with most rec divers, most of the time. The system is primarily based on everyone being on the same page - which they are not.

Reliance on standardization becomes sub optimal - it is far more advantageous to have a working exposure to many different systems.
Reliance on your buddy being there with your back up gas is sub optimal - better to become self reliant.
Scalability falls apart because rec diving is the apex for most rec divers.

I could go on but my fingers are tired. One can say that the real solution is to change the rec world but that's also wishful thinking, it is what it is. I also don't knock anyone for their choices or the defense of them but I have the right to mine and I will defend them as well, especially on a discussion forum. If no one stands up and cals BS the perception is that a small minority are representative of diving. The DIR system is great, for what it was designed for, but it only represents a small fraction of the market share of rec diving philosophy and no more valid than many others.

And the line is often drawn by one side that cannot accept change or deviation coming from anywhere but their organization. The truth is there are good things that come from other regimes. The confusion comes when tech solutions are suggested to the novice rec diver without any consideration of what that might look like outside a holistic approach.
 
The military sport bike rider course teaches you to hang off the bike in turns to keep the bike upright allowing you to carry more speed through a corner more safely.

This is a rider safety course to develop skills for the street...and it takes cues from...RACING?

There is no end to the examples of professional skills and practices crossing over into their recreational counterparts.



Why there is a constant need to draw a line in the sand and say if your recreational diver, your on my side, and if your a tech diver your not. This seems to me like the largest most fundimental way to confuse the crap out of new divers that are influenced by anything other than a vacation resort type of diving community.



+1 :thumb:
The bike course is not primary focused at safety, it focused on going faster!!! Going faster on streets is not a good idea and definitely does not add to safety.

The same holds true for this pony use in rec diving. Stick to what you have learned from a safety and procedural perspective. Stick to the dive plan, stick to you buddy and check you gas. Why the extra gas? It not making you a safer diver!
 
True about ponies not making one a safer diver - that is a mental aspect. A pony does offer options though. So the argument is between adopting options or rejecting them. In a strong team it may be valid to reject a pony because other options are available but in rec diving with unknown buddies or solo, one will have to explain why they reject the option of immediately available gas. That mental approach could be argued as deliberately unsafe (unless the reasoning was sound). That's where the discussion becomes fruitful because it deals with the core issue.
 
Technical divers don't plan to finish a dive with 60% of the gas they started the dive with. Nor do they carry extra stages and deco bottles in case they accidentally completely ignore their dive plan.

Carry a small pony if you wish on your rec dive, but don't dive thirds and carry a spare 80 "just in case" you intentionally do everything wrong.

IMHO that is a little bit of a manipulation on where we are right now. Many pages ago I admitted to mistakenly suggesting carrying an 80 when I really meant a 40 or 30, and never once did I say I don't plan my dives, or make up a plan and leave it behind when I get to the water. I also dont see how diving 3rds gets you out of the water with 60% of your air...It would get you out with 30% Unless you are including the sling in that 60%. Paying for a fill when you only used 30 of your 80cf may be a waste. But if you dont touch the gas in the sling, you have it for next time...if you need it.

With regard to what you quoted me on, I was plain and simply stating there are practices and equipment variations form tech to rec that cross over. Not specifically regarding deco or stages for deco. For instance the DIR style harness and BP/W. Am I not allowed to use this gear because its "technical diving gear"? Thats the setup I dive because it makes more sense, fits better, is more versitile, and solved any of the trim issues I was having with a jacket BC.

Im sorry for yelling.
 
Correction:

It has been brought to my attention that the "Decompression Procedures" course I suggested is not an IANTD offering. This is correct, it is TDI's ( TDI Home | SDI | TDI | ERDI).

Apologies for any inconvenience: Decompression Procedures Diver | SDI | TDI | ERDI

Please note that this is an informational-only course. It is my belief that this course gives the sport diver a solid understanding of what entering "deco" means and then provides a "no panic" path back from light deco situations. This course certainly does not equip one to begin technical diving. It just provides a measure of understanding and is an excellent way to cross over the "we can't talk about that" gulf between sport and tech diving.
Thanks.
the book "Deco for Divers" by Mark Powell is also an excellent reference.
 
...//...I wasn't aware that any tech courses were/are available as theory only?!?! That seems like it might be incorrect...

OK, maybe also a problem with my definition of "theoretical". All the course theory online and a couple of simulated deco dives in a quarry remains my definition of "in theory only".

However, this is a great way for a recreational diver to expand one's safety horizons in an entirely acceptable way. Again, my opinion...
 
IMHO that is a little bit of a manipulation on where we are right now. Many pages ago I admitted to mistakenly suggesting carrying an 80 when I really meant a 40 or 30, and never once did I say I don't plan my dives, or make up a plan and leave it behind when I get to the water. I also dont see how diving 3rds gets you out of the water with 60% of your air...It would get you out with 30% Unless you are including the sling in that 60%. Paying for a fill when you only used 30 of your 80cf may be a waste. But if you dont touch the gas in the sling, you have it for next time...if you need it.

With regard to what you quoted me on, I was plain and simply stating there are practices and equipment variations form tech to rec that cross over. Not specifically regarding deco or stages for deco. For instance the DIR style harness and BP/W. Am I not allowed to use this gear because its "technical diving gear"? Thats the setup I dive because it makes more sense, fits better, is more versitile, and solved any of the trim issues I was having with a jacket BC.

Im sorry for yelling.

I didn't read the whole thread. My issue is with the things you said in the OP. You're "diving thirds" during a rec dive for absolutely no reason whatsoever. That's silly. You also said you'd be slinging an 80. That would mean you're going down with about 150 CF between your two bottles and coming up with about 100 CF between your two bottles. On a rec dive.

Carrying redundant gas is fine. It's a good idea on many dives, in fact. Diving thirds on a typical rec dive is not a good idea. Planning ahead to have extra gas "in case of accidental deco" is not a good idea. That's a very poor reason to load yourself with extra bottles.
 
I didn't read the whole thread. My issue is with the things you said in the OP. You're "diving thirds" during a rec dive for absolutely no reason whatsoever. That's silly. You also said you'd be slinging an 80. That would mean you're going down with about 150 CF between your two bottles and coming up with about 100 CF between your two bottles. On a rec dive.

Carrying redundant gas is fine. It's a good idea on many dives, in fact. Diving thirds on a typical rec dive is not a good idea. Planning ahead to have extra gas "in case of accidental deco" is not a good idea. That's a very poor reason to load yourself with extra bottles.

All fair points.
And I cant really blame you for not reading the entire thread, it's become a little exhausting. I'm just saying, commenting on the OP of a 12 page thread is asking for an arguement...as I found out myself once or twice.
 
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All fair points.
And I cant really blame you for not reading the entire thread, it's become a little exhausting. I'm just saying, commenting on the OP of a 12 page is asking for an arguement...as I found out myself once or twice.

Posting about how you're going to dive thirds on a rec dive and sling an Al 80 in case of "accidental deco" is asking for an argument too. I'm happy to oblige ;)
 

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