http://engineeringtv.com/blogs/etv/archive/2009/04/28/paragon-dive-system.aspxThe Paragon Dive System isolates a diver in a “space-suit like environment”, incorporating a Return Surface Exhaust design and upgraded materials, completely protecting divers from contaminants and hazardous materials present in their surrounding environmentenCommunityServer 2007.1 (Debug Build: 20917.1142)