High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The Confédération Mondiale des Activités Subaquatiques CMAS is the World Underwater Federation. CMAS is the international umbrella organisation for diver training organizations. It was founded in Brussels on September 28, 1958. One of the founding members was the French underwater pioneer Philippe Tailliez. As such, it is one of the world's oldest scuba diving organizations. The cave Diving Group (UK) (CDG) was founded in 1946)(the British Sub-Aqua Club was founded in 1953. The international office is currently in Rome. CMAS offers an international framework for diver and instructor qualifications. Members of the CMAS Council are representatives of recognised national dive organisations, which guarantee the CMAS standards are upheld within the constraints of local dive conditions. These national organisations award CMAS qualification cards which have the CMAS grade on one side and details of the national organisation and the person they have qualified on the other.