Bruce: >> we may never know the real cause unless their gear is recovered...and maybe not then, if cylinders are empty. << A cylinder is never empty (vacuum). Furthermore, because of the ambient pressures involved these cylinders would still contain some "pressurized" gas if brought to the surface (assuming no freeflow during ascent) Andy -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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