In a message dated 6/29/99 10:01:21 PM, secor@btv.ibm.com writes: <<The rebreathers I'm certified on are the Drager Atlantis semi-closed units that used to be sold by Uwatec. These are nitrox rebreathers that use a constant mass flow for gas injection. The price of these rebreathers are in the $4K-5K range. Al>> OUCH!