An age-old question: ways to 60m.

[J-Vo]

Denominator lives matter

 

[old frogman]

I will share some stats; Uluburun shipwreck was excavated between 1982 and 1994. Depth 44m - 61m. Dives were done on air with surface supplied o2 for accelerated decompression, typical bt being 20-30 mins at target depth.
22+k dives and 0 fatalities.

This is very compelling and persuasive in support of deep air:
-Expedition conducted by the Institue of Nautical Archaeology (INA).
-Over 11 seasons between 1984 to 1994, 22,000 dives and no reported fatalities.
-Depth range exceeding 150 feet and up to 200 feet.
-Report indicates air as the bottom gas with oxygen for accelerated decompression. No mention of nitrox or trimix. Understandable as technical diving was not formally established until about 1995.
-What is truly impressive is that these dives required divers to perform tasks and make decisions in addition to executing the dive.
-Photographs in the report show divers using standard open circuit scuba gear of the time (single tank and twin tank configurations).

So, there you go compelling and persuasive that deep air is doable. 22,000 dives and no fatalities.

The key to its success would have been good planning based on good situational analysis and good control in execution.

Certainly, blows a humungous hole in the argument put forward by the DIR brigade.

 

[crofrog]

Certainly, blows a humungous hole in the argument put forward by the DIR brigade.

Not really. The physiology is what it is.

 

[NothingClever]

.

 

[old frogman]

Not really. The physiology is what it is.

More like ideology is what it is.

 

[NothingClever]

Given the choice between DAN, Duke University and the NEDU on one side and “old frogman”, “boarderguy” and a couple of other internet scientists in their ScubaBoard laboratory on the other side, I’m going to draw a deep breath for courage and take a wild leap of faith to go along with guidance from DAN, Duke University and the NEDU.

I know…call me crazy.

 

[Kay Dee]

So again let me ask........since no takers so far to my previous......and I'll make it even easier..............

........how many more people do you (anyone can join in here ) know that died on deep air than and how many do you know that died on OC trimix or CCR?

 

[Kay Dee]

Given the choice between DAN, Duke University and the NEDU on one side and “old frogman”, “boarderguy” and a couple of other internet scientists in their ScubaBoard laboratory on the other side, I’m going to draw a deep breath for courage and take a wild leap of faith to go along with guidance from DAN, Duke University and the NEDU.

I know…call me crazy.

Crazy! (Just joking, but you asked after all )

I have all the respect in the world for the 'insitutions' you mention, and your right to choose, but whether I follow their guidence on this matter is also my right to choose. And the ScubaBoard laboratoy you mention above, well I dont know anything about that one, as I thought this was a forum where one voiced ones veiws, not 'experimented', but I 'worked' in a real world laboratory for 30 odd years where you actually got wet, so am more inclined to go by the lessons / facts learnt there, as opposed to some of the ignorance nonsense sprouted here.

 

[old frogman]

Given the choice between DAN, Duke University and the NEDU on one side and “old frogman”, “boarderguy” and a couple of other internet scientists in their ScubaBoard laboratory on the other side, I’m going to draw a deep breath for courage and take a wild leap of faith to go along with guidance from DAN, Duke University and the NEDU.

I know…call me crazy.

Not sure what the other side is? NEDU that is the US Navy, Naval Experimental Diving Unit. They are the ones responsible for producing the US Navy Diving Manual and periodically revising it.

Let's see, US Navy Diving Manual - Revision 7, Chapter 7 SCUBA Air Diving Operations, page 7-2, Maximum working limit for air 190 feet (58 metres).

Also, if you peruse the US Navy Tables you will note they cover air diving to 300 feet depth of sea water.

Also, some of us do have science degrees from real universities. Which means we challenge rules (as opposed to breaking rules).

True scientists oppose ideology. Like Galileo, Leonardo Da Vinci etc. opposing the Roman Catholic Church in the Renaissance.

Science is not black and white. In particular, science related to physiology is very grey. Yes, we can arbitrarily set lines across grey areas and call those lines rules or standards.

I will look at rules but is they do not fit the context of the dive; I will challenge the rules. If necessary, I will modify or discard them for something more suitable.

Of course, perception will play a part. That is educated perception.

 

[iliketopetsharks]

Some (not all) people here seem to think that all you need to get outta trouble is to be breathing helium mixes,

So who died and made you the spokes person for everyone on here? Maybe what I said doesnt apply to you / yours, so thats about the best you can claim, not "no one thinks that".

Boy oh boy, are some of you people THICK!

Oh the irony