normoxic definition
Normoxic is a gas mix with the same level of oxygen as found in air, (normal level of oxygen). Hypoxic is a gas mix with a lower level of oxygen than found in air. Enriched air Nitrox is hyperoxic- it has a greater level of oxygen than found in normal air. Normoxic Trimix is used to reduce the END diving within air limits. It has 21%oxygen, but some of the nitrogen is replaced with helium to reduce narcosis at depth. Hypoxic Trimix is used to dive deeper than safely possible on Normoxic mixes.