Milestones in order. This is history, not a weekly activity grid.
- Aqua-Lung
- The Silent World
- PADI founded
- SSI founded
- Computers
- Nitrox mainstream
- Liveaboard boom
- eLearning
Darker cells mean a higher score for this topic on that metric.
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Quick answers
Which local rescue or training agency should I check first?
Use the local lens: coastguard/federation norms and the shop briefing for that bay — not a blog visibility claim.
What is a typical first depth limit?
Many Open Water cards are written to 18 m. Further training raises that toward 30–40 m inside recreational no-stop diving.
Who invented the Aqua-Lung?
Emile Gagnan and Jacques Cousteau’s 1943 demand regulator is the usual origin of open-circuit scuba.
Is Nitrox required?
No. Enriched air is a common extra course. Air remains the default.
Can people stop after a course?
Yes. Skills decay. A checkout after a layoff is normal.
What does recreational exclude?
Planned decompression, overhead wreck or cave penetration, and untrained solo diving.
Military and working divers used rebreathers and helmets first. Recreational scuba begins when the Aqua-Lung and later storefront agencies made a holiday course possible.
The history is a regulator, then a storefront, then a reef under pressure.
Timeline
- Aqua-Lung
Cousteau and Gagnan demonstrate the CG45 demand regulator.
- The Silent World
A Palme d’Or film sells looking-under as a public dream.
- PADI founded
A US storefront model that later goes global.
- SSI founded
Another mass-training brand.
- Computers
Dive computers move from novelty to default.
- Nitrox mainstream
Recreational enriched-air courses spread.
- Liveaboard boom
Red Sea, Raja and Maldives weeks become a product.
- eLearning
Classroom hours shrink; the ocean does not.
Eras
- 1943–1966 — Inventors and clubs — Cousteau, navies, amateur federations.
- 1966–1990 — Storefront agencies — PADI and SSI scale the holiday course.
- 1990–2010 — Computer and travel — Nitrox, liveaboards, digital cameras.
- 2010–now — Mass and bleaching — More divers, hotter reefs, tighter parks.
Milestones
- CG45 regulator — The breath that made sport diving possible.
- PADI Open Water — The world’s most common entry card.
- Dive computer — Changed how no-stop time is felt.
- Project AWARE — Agency education that is still not a park law.
Recreational scuba is a 1943 regulator wearing a 1966 storefront. The reef is older than both.