Confédération Mondiale des Activités Subaquatiques, the international umbrella organization for underwater sports, both competitive (e.g. freediving, underwater hockey) and recreational (e.g. scuba diving, snorkelling)
Aytür joined the national team formed by the Turkish Underwater Sports Federation (TSSF) in 2005, and represented his country at the 10th World Underwater Photography Championship in L'Estartit, Spain organized by the Confédération Mondiale des Activités Subaquatiques (CMAS).
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Krzysztof Starnawski (born 1968) is a Polish technical and cave diver and International Association of Nitrox and Technical Divers (IANTD), Confédération Mondiale des Activités Subaquatiques (CMAS), French Federation of Speleology (FFS) diving instructor.
To bring this game to the international arena, Grimmeisen turned to the two then most important members of the World Underwater Federation (CMAS), France and the USSR.