The IANTD Normoxic Trimix Diver program is designed to train divers who wish to dive to depths between 39 and 60 msw (130 and 200 fsw), but do not wish to breathe air below 39 msw (130 fsw). Trimix affords a means of managing nitrogen narcosis by reducing the Equivelent Narcotic Depth (END) to a maximum of 36 msw (120 fsw).
The IANTD Normoxic Trimix Diver program includes academic lectures, confined water skills development and open water dives using air, EANx or Trimix using one gas switch. Gas switching computers can be used (and are recommended) but IANTD tables must be used as a backup.
This program qualifies divers to perform Trimix dives to a maximum depth of 60 msw (200 fsw) using custom bottom mixes with a minimum oxygen content of 19% and a maximum of two decompression cylinders.