TecDiveTools

Free technical diving calculators, and a directory of tec-friendly dive centres and instructors — searchable by certification agency, course, and rebreather support.

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Technical Diving Agencies Compared: What the Standards Actually Require
Technical Diving Agencies Compared: What the Standards Actually Require

TDI, IANTD, PADI TecRec, SSI XR, RAID, NSS-CDS and GUE, compared on the only thing that is genuinely comparable — the minimums each publishes for the same rung, with a link to every standard.

What You Need To Know About Cave Diving In Thailand
What You Need To Know About Cave Diving In Thailand

Three divable cave systems, hundreds more closed by permission rather than geology, visibility that will test you, and why you should leave the drysuit at home. A first-hand guide to diving Song Hong, Sra Keow and Klang.

Who's Who in Thailand's Technical Diving Scene
Who's Who in Thailand's Technical Diving Scene

From two Tham Luang rescuers to a cave evaluator who trains the trainers, meet the instructors and dive centres shaping technical and cave diving in Thailand.

Which Rebreather Should You Pick? Here Are a Few Ways to Decide
Which Rebreather Should You Pick? Here Are a Few Ways to Decide

There is no best rebreather — only the best one for the diving you intend to do. Work through configuration, your existing kit, how the oxygen is controlled, and who can teach you, with real unit prices and what each one actually includes.

Calculators

Dalton TrianglePO₂, FO₂ & depthNDL CalculatorNo-decompression limitsSAC RateGas consumption rateEquivalent Narcotic DepthNarcosis-equivalent air depthDeco & Gas PlannerBuhlmann deco planning