Trimix is any gas that is a mixture of helium, nitrogen, and oxygen where the oxygen is generally below 21% and is usually used for dives that go deeper than 60 m (200 feet). Normoxic is a Trimix in which the oxygen percentage does not go above 21% and is usually used for dives that are between 40 m and 60 m (130 feet and 200 feet).
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What is Trimix?
- Dive Training
- Mixed Gas Diving Skills