On Thursday, August 21st 2003 a new depth record was set using closed circuit breathing dive equipment. Chris Ullmann, Manfred FŸhrmann and Volker Clausen believe that they have completed the deepest rebreather dive ever accomplished after reportedly descending to 224.5m. The trio of record setting divers spent 6 hours in decompression on their gradual return to the surface.

The three man team used mixed gas Inspiration closed circuit rebreathers, VR3 computers and carried a variety of open circuit bail out cylinders. Support divers were stationed from 100m upwards, and the final and longest section of their decompression was carried out inside an oxygen filled underwater habitat at 6m.