deepest dive!

Allan_o

Hi Rebreather World.

does aynone know who Holds the record for deepest dive (officially) on ccr and OC?
And how deep was it?


Regards Allan

DrJM

CCR: Dave Shaw once alive "walking on the moon" between -240 and -270m with a Mk15.5 Colkan with special Hammerhead elec, second time ...

OC: a few guys below 300m touch and go on the sand

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Mark Chase

I agree. Dave Shaws dive was a proper dive where as some of the other so called depth records are a bounce to X depth.

Comex went a LOT deeper on CCR 510m on a Mk15.5s I beleive? but they were saturation dives using habitats so dont show in the record books.

ATB

Mark Chase

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cedricverdier

Have a look at:
Home Page - Deep Cult - diving deeper than 200m / 660fsw

All the depth records there.

Cheers

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Drmike

Thats the trouble with quantifying what is regarded as a 'deep dive'.

Depth alone is nothing - with the right equipment these days anyone can sink breathe in breathe out and ascend its only hard if something goes wrong

To be fair Daves original 270m dive was a bounce dive if you look at the cave profile - as was Shecks last dive.

In my book the real achievers are people like Jerome who are consistantly doing long AND deep technical penetrations and exploring at great depth involving great distance too. Just taking a look at some of the cave profiles hes been doing over in France that terminate in depth is enough to give you the willies. May as well be on the moon.

In my book a 300m OW bounce dive is not in the same league as a 150m technical cave exploration dive.

But maybe Im just sore because neither of us are 'good enough' (circa 190m) to be on Cedrics cool site ...at least not yet

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Dave Sutton

COMEX never used the Mark-x series at all, but relied on pure umbilical fed saturation technology. AFAIK they did not use a rebreather at all, even for bailout. I was working for a competitor of theirs at the time (Santa Fe) and we were using the Cachalot 1000 and 1500 sat systems (each named for the design depth limit), and as a competative study were paying *very* close attention to their (COMEX) methods. Like Santa Fe and Oceaneering International (who made their own helmet, the "Rat-Hat), COMEX used a large assortment of internally manufactured equipment in order to maintain a commercial advantage. If they ever did use a rebreather of any sort, it was not off-the-shelf. In the case of Santa Fe, we actually fabricated our own saturation diving complexes from pressure vessel to bell to life suport systems I spent a year personally as a fab-tech plumbing the Viking Piper Sat System (The Viking Piper is now the Stolt Offshore semi-submersible pipelay barge LB 200 and was the first barge system designed to lay pipe in 1000 feet of water) so I know of what I speak. In the industry, the use of the modified CCR-1000 "Porpoise Pack" as a saturation bailout system was *extremely* limited even in deep saturation dives. Santa Fe was experimenting when I was there with the DIVEX Arawak "Push-Pull" system whereby the bell was used essentially as a counterlung, with the scrubber mounted in a fan-fed enclosure in the bell. The gas was "pushed" from the bell to the diver with a pump that fed his helmet and "pulled" back into the bell for scrubbing, thus is was a closed circuit rebreather system, albeit not "diver worn". With this system we did slightly in excess of 1000 feet, 1030 to be exact. This system was functionally identical to the Morse/US Navy Mark-XIV system, but was not the same system. AFAIK the Mark-XIV system was short lived in the Navy, and the DIVEX "Arawak" system had a limited lifespan as well. The so-called "Shell oil dives" on the Mark-15 (CCR-1000 actually) are a myth, there never *being* a Shell Oil diving team. All of that sort of work was done by specialty diving contractors (Taylor, McDermott, Santa Fe, Oceaneering, and COMEX). Of the big 5, only Oceaneering and COMEX were independant "dive only" contractors, the other three were in-house diving teams for full-service offshore construction contractors. Santa Fe was closely associated with DIVEX, and we used their rebreathers (DIVEX 3000 semi-closed, umbilical fed rigs) virtually to the exclusion of all others. CCR-1000's were as rare as rocking-horse-shit. We had two of them as compared to probably over 50 DIVEX 3000's.

Been there, done that. And agreed 100%: Autonomous rebreather diving has *far* less safety margin than sat diving.

Dave Sutton

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