From October 28 to 30, 2025, the International Workshop on Building the Asian CoralWatch Coral Reef Ambassador Hub was held at the Marine Affairs Research Center, National Kaohsiung University of Science and Technology (NKUST), in collaboration with ...

Official Statement The World Confederation of Underwater Activities (CMAS) actively participated in Seawilding 2025, an event that brought together prominent international researchers and specialists in marine conservation and ecosystem restoration, ...

Double world champion at the recent CMAS World Championships in Marina El Alamein, Egypt, now holding eleven individual world titles ! Unbeaten since 2021 in the 3 km bi-fins events, only once in the 1km bi-fins during the same period, Clément Batte ...

🌐 CMAS invites you to join the next ITA Monthly Webinar! Topic: What You Need to Know for 2026 🗓 Date: Thursday, 6 November 2025 🕑 Time: 14:00 – 15:00 CET 🎙 Panellists: ●Dr Mark Stuart – ITA Drugs, Health & Development Senior Manager and Sports P...

Triple World Champion in Open Water and a symbol of inspiration for Egyptian Finswimming Winning a gold medal at home, in front of her own supporters, made the 2025 CMAS Open Water World Championships in Marina El Alamein truly unforgettable for Nada...

We have concluded an intense week at the CMAS International Scientific Diving Course 2025, held at the UALG Scientific Diving Center in Faro, where science, diving, and training came together in an outstanding environment.We are proud to announce tha...

[Factsheet] Bühlmann's sets of parameters (ZH-L) are used in almost all dive computers.  In the literature available, there is a great deal of confusion, with the concept of a model being confused with that of parameter sets. Furthermo...

[Factsheet] The DCIEM desaturation model is the result of a programme launched in 1962 by D.J. Kidd and R.A. Stubbs, which led to the KS-1971 model (Kidd and Stubbs 1971) and was subsequently improved by Nishi and Lauckner to produce the DCIEM 1983.D...

Whereabouts Matter | ITA Webinar 📅 Wednesday 15 October | 14:00–15:00 CEST CMAS is pleased to promote the next session of the Monthly Webinar Series organised by the International Testing Agency (ITA): "Whereabouts Matter: An Athlete's Role in Protec...

Dear Presidents, dear friends, We are delighted to inform you that the forthcoming GA 2026 will take place in Bordeaux on the 15th to 19th of April. We invite you to view the attached brochure which includes all the information you will need. It is p...

Barcelona, September 24, 2025. – The International Conference SeaWilding 2025, officially recognized as an Activity of the United Nations Decade of Ocean Science for Sustainable Development, has signed a Collaboration Agreement with the World Confede...

🌐 CMAS invites you to join the next ITA Monthly webinar! Topic: Ask the Expert: Supplements Part II 🗓 Date: Thursday, 25 September 2025 🕑 Time: 14:00 – 15:00 CEST 🎙 Panellist: Jeni Pearce, MNZM, NZRD – Performance Nutritionist 🎤 Moderator: Lisa Getz ...

The Institute of Marine Sciences and Limnology (ICMyL) of the National Autonomous University of Mexico, in coordination with the Mexican Federation of Underwater Activities (FMAS) and the World Confederation of Underwater Activities (CMAS), celebrate...

[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 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] 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] Deep stops include : Stops at half the maximum depth (also known as "Pyle stops");Stops deeper than those proposed by the desaturation model, due to the setting of gradient factors (GF), in particular with a GFlow lower than GFhigh. More ...

[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...

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...

[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...