Diving
Fitness to Dive: Why the Medical Form Is Not a Formality
PFO, asthma, diabetes and certain medications can all change whether diving is safe. Here is why the medical questionnaire before a course matters.
Jan 27, 2025
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15 stories for“fitness over 40”
Diving
Your Gas Consumption Is Not One Number: Why Depth, Cold and Nerves Change It
A diver's surface air consumption rate looks like a fixed fact. It is a moving average that depth multiplies and stress inflates, which is why reserves exist at all.
Oct 16, 2026
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
Deep Dive Dubai: 60 Metres of Water and No Weather at All
The world's deepest pool holds 14 million litres at a constant 30C, with a sunken city at the bottom. What it removes from diving turns out to be the interesting part.
Aug 6, 2026
