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In July there was a series of postings on the death of Ed Suarez, who drowned in a deep mine. The latest issue of _Underwater Speleology_, the NSS-CDS newsletter, includes an accident analysis on the incident by Lamar Hires, NSS-CDS training chairman. He attributes the accident to failure to observe the rule of thirds, possible failure of a regulator at depth, and possible deep water blackout (Suarez had switched from mix to air at 250 ffw; he had blacked out on air on a previous dive in the same mine at 210 ffw). On this dive, he had completely exhausted the mix in a set of doubles he was carrying, and had switched to a third single of mix. When the regulator on this tank failed, he had no mix backup and had to go onto air. Suarez apparently had a history of "creative" gas management. The Captain of a New Jersey dive boat told me that Suarez was banned from his boat because he "never came up on his own air." The Captain felt that he had become very good at surviving some very bad diving practices, and that they finally caught up with him. I don't like to speak ill of the dead, but I thought it appropriate to mention this considering the thread on manifolds and the thirds rule. John heimannj@ma*.nd*.gt*.co*
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