Resources

A curated directory of the organizations behind diver training, dive safety, and marine conservation — worth knowing regardless of where you dive.

Interactive Dive Tools

Dive Math CalculatorsSAC rate, MOD for nitrox, and a simplified NDL estimator — with formulas cited in-line.Dive Physics RefresherInteractive Boyle's, Dalton's, and Henry's Law explainers, plus a dive table walkthrough.

Training & Certification

PADIThe world's largest scuba diver training organization.SSIScuba Schools International — global training and certification.NAUIOne of the oldest nonprofit diver training agencies.SDI/TDIRecreational and technical diver training agencies.BSACThe British Sub-Aqua Club — UK's national governing body for diving.

Safety & Hyperbaric Medicine

Divers Alert Network (DAN)Dive safety association — emergency hotline, insurance, and research.UHMSUndersea & Hyperbaric Medical Society — clinical research and guidance.

Marine Conservation & Research

Coral Reef AllianceNonprofit working directly with communities to save coral reefs.Project AWAREGlobal movement of divers protecting the ocean planet.Reef CheckVolunteer-driven reef and rocky-reef monitoring network.iNaturalistCitizen-science observation platform — the data source behind this app's species guide.