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60 stories for“physics”
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
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
Safety divers, counterballast lines and strict medical protocol turned a high risk sport into one of the most closely supervised in the water.
Mar 11, 2025
DAN is a name every diver knows, but membership and dive accident insurance are not the same thing. Here is what each one actually buys you.
Jun 30, 2025
The world's largest training agency is also the most argued about. Setting the snobbery aside, here is what a PADI course actually mandates, where the flexibility sits, and what the card does not cover.
Aug 12, 2026
A dive computer tracks pressure and time with precision, but the model behind it cannot see the diver wearing it. Here is what that gap actually means.
Mar 19, 2026
Technical diving instructor Adam Jacoub died on 18 July 2026 following a dive in Hurghada, Egypt. The circumstances remain under investigation.
Jul 20, 2026
Divers call it the bends. Doctors call it decompression sickness. Here is what nitrogen bubbles actually do to tissue, and how hyperbaric treatment reverses it.
Feb 14, 2024
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
Coughing pink after a deep dive is not something to shrug off. Squeeze happens when tissue cannot keep up with pressure, and the usual causes are tension, forcing equalisation and pushing depth too fast.
Aug 13, 2026
The old assumption was that one breath cannot load enough nitrogen to matter. Repetitive deep dives with short surface intervals disprove it, and the divers it happens to are usually working, not competing.
Aug 12, 2026
