David Shaw (diver)
|David "Dave" John Shaw|
|Died||January 8, 2005|
|Occupation||Scuba diver, Airline pilot|
Shaw's first rebreather was an Inspiration closed circuit rebreather, which he eventually dived to depths beyond the unit's supposed capability. That prompted him to purchase a Mk15.5, which he modified by removing the analogue electronics and replacing them with the Juergensen Marine Hammerhead digital electronics, in a specially modified POD designed to handle extreme pressures. The Mk15.5 was his rebreather of choice for dives deeper than 150 metres (500 ft). Shaw also owned a Cis-Lunar Mk5P that he used on extended dives in caves shallower than 150 m. He believed the Cis-Lunar had greater redundancy capabilities for such dives but could not cope with extreme depths.
- Depth on a rebreather
- Depth in a cave on a rebreather
- Depth at altitude on a rebreather
- Depth running a line
He used a Mk15.5 with Juergensen Marine Hammerhead electronics and the following gas mixtures: trimix 4/80, 10/70, 15/55, 17/40, 26/25, air, nitrox50, 100% oxygen. The cave elevation was 1,550 metres (5,090 ft) and the dive duration was 9 hours 40 minutes.
Shaw recorded his dive with an underwater camera, which allowed researchers to determine that he suffered from respiratory issues due to the high pressure. Shaw ran into difficulties when he cut loose Dreyer's harness and the body unexpectedly began to float. Shaw had been advised by various experts that the body would remain negatively buoyant because the visible parts were reduced to the skeleton. However, within his wetsuit, Dreyer's corpse had turned into a soap-like substance called adipocere, which floats. Shaw had been working with both hands, and so had been resting his can light on the cave floor. The powerful underwater lights that cave divers use are connected by wires to heavy battery canisters, normally worn on the cave diver's waist, or sometimes attached to their tanks. Normally he would have wrapped the wire behind his neck, but he was unable to do so; the lines from the body bag appear to have become entangled with the light head, and the physical effort of trying to free himself led to his death. The next day, both of the bodies floated up to near the surface as the dive team was retrieving their equipment.
- "Deep Cave Diving with Dave Shaw". Deep Cave.
- "Scuba Diving World Records - Deepest Longest - Dave Shaw - Nuno Gomes - Verna Van Schaik - Pascal Bernabé - Mark Elyatt - Johan Beukes". ScubaRecords.com.
- Zimmermann, Tim (August 1, 2005). "Raising the Dead". Outside Magazine.
- Shaw, David. "Deepcave.com". Retrieved 2008-08-26.
- Mitchell SJ, Cronjé FJ, Meintjes WA, Britz HC (February 2007). "Fatal respiratory failure during a "technical" rebreather dive at extreme pressure". Aviat Space Environ Med 78 (2): 81–6. PMID 17310877. Retrieved 2008-06-15.
- David Shaw. "The Last Dive of David Shaw". Retrieved 2011-05-10.
- Finch, Phillip (2008). Diving into Darkness: A True Story of Death and Survival. New York: St. Martin's Press. p. 295. ISBN 0-312-38394-0. LCCN 2008024271.
- "Episode 515: Good Guys, Act 3". This American Life.
- Washington, Glynn (October 31, 2014). "Where No One Should Go". Snap Judgment (NPR.org).
- Diving into Darkness, pp. 2, 25.
- Diving into Darkness, pp. 29-30.