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5 stories for“trimix certification”

The Path Into Technical Diving: What Changes at Depth

Technical diving begins the moment a diver can no longer go straight to the surface. Here is how training builds toward that shift, one course at a time.

Dec 5, 2025

Diving

IANTD: The Agency That Made Nitrox Respectable

In the late 1980s, teaching recreational divers to breathe enriched air was close to heresy. IANTD taught it anyway, then built the trimix and rebreather syllabi much of technical diving still runs on.

Aug 12, 2026

Diving

Air Versus Mixed Gas Below 50 Metres, Explained

Below 50 metres, ordinary air becomes a liability for divers. Here is the physics behind nitrogen narcosis, rising gas density, and why trimix exists as the technical diving standard.

Jun 8, 2026

Diving

NAUI: The Agency That Lets the Instructor Decide

Older than PADI, structured as a non-profit membership association, and built on a principle almost nobody else uses: the instructor may exceed the standards, and is expected to.

Aug 12, 2026

Diving

SSI: The Dive Centre Is the Unit, Not the Instructor

Scuba Schools International built its model around the store rather than the individual teacher, gave its digital learning away, and quietly became the main alternative to PADI in most of the world.

Aug 12, 2026