[Factsheet] The 1908 publication established the first decompression model and the first diving tables, creating the concept of decompression stops based on the maximum depth reached and the dive time (which at the time was opposed to a slow and...

[Factsheet] Apart diver training and experience, the maximum depth for diving depends on: A physiological limit linked to the gas breathed (narcosis, hyperoxia, density, DCS); Historical-social-touristic-cultural considerations which may lead certain...

[Factsheet] The density of the gases breathed in during diving is one of the limiting factors, because of the breathing difficulties (WoB: Work of Breathing) and the accumulation of CO2 that it can cause. More information on fact-sheets section.

[Factsheet] Narcosis is 'progressive from 35 to 60 m depth when diving with air, with no threshold effect, and systematic beyond 60 m' More information on fact-sheet section.

[Factsheet] The dive computers display a reference to certification in compliance with different regulations.This does not concern the software, only the pressure, time measurement and interferences.The software is not certified; it is created u...

[Factsheet] Following the Biomechanics of Safe Ascents Workshop in 1990, everyone agreed on an ascent rate of 10 m/min. According to Bennet and Elliott, 'Today, an ascent rate of 10 m/min (33 feet per minute) is adopted by a large number of dive comp...

Topic: Ask the Expert: Therapeutic Use Exemptions 🗓 Date: Thursday, 28 August 2025 🕑 Time: 14:00 – 15:00 CEST 🎙 Panellist: Pedro Goncalves, PhD – ITA Science & Medical Manager 🎤 Moderator: Nikki Hamblin, OLY – ITA Education Team This interactive ...

We are pleased to announce the CMAS International Scientific Diving Course, which will take place in the beautiful city of Faro, Algarve, Portugal, from 19 to 26 September 2025. Organized by the Scientific Center of the University of Algarve in colla...

Spotlight on Finswimming! The countdown is almost over! In just a few days, the world's best finswimmers will take the stage in Chengdu, China, for the 12th edition of the World Games, set to take place from 8 to 17 August 2025. For our sport, the sp...

This brief report presents a summary of the activities carried out during the 5th UABC Scientific Diving Course, held from June 9 to 25, 2025, at the UABC Ensenada campus facilities and dive sites within the Bay of Todos Santos, Baja California, Mexi...

📅 Thursday 31 July | 🕑 14:00–15:00 CEST CMAS is pleased to promote the next session of the Monthly Webinar Series organised by our partner, the International Testing Agency (ITA): "Mental Health in Sport" – featuring Camille Cheng, three-time Olympic...

Le 27 juin 2025, la CMAS était représentée par son vice-président honoraire, Alain Germain, aux cérémonies des 80 ans du CEPHISMER (Marine nationale), créé en 1945 par Philippe Tailliez, Jacques-Yves Cousteau (également président fondateur de la CMAS...

On 27 June 2025, the CMAS was represented by its Honorary Vice-President, Alain Germain, at the 80th anniversary celebrations of CEPHISMER (the French Navy), which was founded in 1945 by Philippe Tailliez, Jacques-Yves Cousteau (who was also the foun...

From June 9-13, 2025, ten years after the Paris Agreement, leaders from all UN member states, international organizations, civil society, and many others convened in Nice for the 3rd UN Ocean Conference. "Our Ocean" was the unifying theme. While CMAS...

📣 Proud Sponsor Spotlight 📣 We're proud to recognise MICROPLUS as an official CMAS sponsor — and thank them for their outstanding support during the 2025 CMAS World Championship Finswimming Indoor Masters and Juniors in Chios, Greece! 🇬🇷🌊 From real-t...

🧠 Building Resilience in Sport | ITA Webinar 📅 Thursday 26 June | 🕑 14:00–15:00 CEST CMAS is pleased to promote the next session of the Monthly Webinar Series organised by our partner, the International Testing Agency (ITA): "Building Resilience in S...

Day 2Discipline: Dynamic Apnea With Bi-Fins (DYN-BF)Date: May 21, 2025Venue: Olympic Aquatic Centre, Athens, GreeceThe second day of the CMAS 2025 Indoor Freediving World Championship continued in full stride with the Dynamic With Bi-Fins (DYNB) disc...

On June 6, 2025, the 5th International Scientific Diving Colloquium – UABC will take place at 2:00 p.m. (Mexican Pacific Time), featuring the participation of researchers from various research institutions. The event will be broadcast live on Faceboo...

The Mexican Federation of Underwater Activities (FMAS), in collaboration with the World Confederation of Underwater Activities (CMAS), is pleased to announce the 2nd International Scientific Diving Course in reef systems, aimed at the certification o...

A new section on CMAS TC website: "Fact Sheets". Many of you are looking for information about diving, how to teach it and the CMAS recommendations. This new section of our website has been created to provide you with an overview of these issues and ...