Will, again, I have little knowledge of rebreathers, but I thought fully closed units have one dilutent gas (helium or nitrogen) and oxygen. If so, how can you possibly use two seperate non-breathable gasses without a working PO2 sensor? If not, then the dilutent must be breathable, but it would have to be like a really low O2 heliox or nitrox, and I can't see that as "very efficient" At 01:05 PM 8/3/98 -0400, <will@tr*.co*> wrote: >That's why the concept of redundancy is used in electronic rebreathers. >And again, even if all the electronics fail, you can then >fly it in a very efficient semi-closed mode. > ----------------------------- Kevin Connell <kevin@nw*.co*> NW Labor Systems http://www.nwls.com ----------------------------- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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