At last a detailed workbook addressing the concerns and safe dive skills and knowledge both practical and theoretical to ensure maximum safety on Trimix dives. Specialized dive planning, planning equivalent narcosis depth, identifying the correct PO2 for various depth from 1.2 to 1.5 PO2 combined with new charts to take the guess work out of mix selection make this an unparalleled approach to Trimix diving. New tables are included with the oxygen limits listed on each dive.

These tables provide additional safety by providing a range of variability in both the helium content and the oxygen percentage. Authored by Tom Mount & Kevin Gurr this material will prove to be the foundation of Mixed Gas Diving.