Rebreathers basically do 3 things: 1. Scrub off CO2 2. Inject O2 to replace what is used 3. Inject a dilutant gas if needed to replace volume Am I correct? I know that dilutant and O2 are sometimes combined in semi-closed circuit units. What range of "breathing gas" are modern rebreathers capable of delivering with adjustments? Is it possible to go from a bottom mix to a deco gas while using only rebreather controls? If so, is it done? John Norman -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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