[abstract] DEEP HYDROGEN DIVING : HYDRA 10 - A 701 MSW RECORD DIVE.

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[abstract] DEEP HYDROGEN DIVING : HYDRA 10 - A 701 MSW RECORD DIVE.

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Title: [abstract] DEEP HYDROGEN DIVING : HYDRA 10 - A 701 MSW RECORD DIVE.
Author: Gardette, B; Massimelli, JY; Comet, M; Gortan, C; Delauze, HG
Abstract: INTRODUCTION : The aims of HYDRA 10 project were demonstrated that divers can operate effectively at extreme depths with a new breathing mixture : Hydreliox (hydrogen, helium, oxygen). METHODS : The onshore dive, HYDRA 10, was performed in the Comex hydrogen hyperbaric facilities in Marseilles by three professional Comex deep divers between November 2nd and December 14th, 1992. The dive protocol included 4 weeks of pre-dive period - 2 days of confinement at 10 msw - 13 days of compression to 675 msw - 3 days of bottom stage between 650 and 675 msw with one excursion dive of 7 hours at 701 msw. - 24 days of decompression from 675 msw to the surface. RESULTS : The ability of divers to operate at depths of 300 to 650 msw was confirmed : the 3 divers were in excellent shape, feeling the same comfort as with Heliox (helium-oxygen) mixture in the 250-300 msw depth range, and showed no symptoms of High-Pressure Syndrome (HPS) and no signs of hydrogen narcosis. One diver reached 701 msw during a 7 hours-excursion dive from 675 msw living depth. In the 3 hours he spent at that record depth, he performed a calibrated effort test on an ergometer under medical control, 8 working dives in the immersion chamber were carried out by the 3 divers at depths of 660, 640, 635, 580, 550, 490, 460 and 145 msw. The adaptation of human beings to long residence times at very great depths was demonstrated : 5 days below 650 msw, 9 days below 600 msw and 16 days below 500 msw and 30 consecutive days breathing hydrogen. CONCLUSION : By limiting the effects of the High Pressure Syndrome, the Hydreliox breathing mixture not only enhances the divers' effectiveness and working capabilities, but also provides for improved safety. Oil companies can now count on human technical assistance at depths far exceeding the limits of conventional helium diving.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held July 7-10, 1993. World Trade and Convention Centre, Halifax, Nova Scotia, Canada. (http://www.uhms.org)
URI: http://archive.rubicon-foundation.org/8144
Date: 1993

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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