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6 stories for“nitrox safety”

Oxygen Toxicity: The CNS Risk Behind Technical Gas Choices

Oxygen keeps divers alive, until pressure turns it toxic. Here is why central nervous system oxygen toxicity shapes every gas decision in technical diving.

Sep 10, 2024

Diving

Aluminium or Steel Decides How Much Lead You Carry, and Almost Nobody Is Told Why

The standard aluminium 80 is negatively buoyant full and positively buoyant empty, which is why safety stops go wrong at the end of a dive. Steel behaves differently, and the valve and testing rules differ too.

Sep 5, 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

PADI, SSI, NAUI, IANTD or GUE: Which Certification Actually Matters

The agencies argue endlessly and the accident data barely distinguishes between them. Here is what genuinely differs, what does not, and the questions to ask a dive centre before you pay.

Aug 13, 2026

Diving

The Open Water Certification: What It Does and Does Not Qualify You For

An Open Water card opens the door to diving worldwide, but it is a narrower licence than most new divers assume. Here is exactly what it covers.

Sep 9, 2025

Diving

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