Record dives in Swiss lakes, GERS Toulon, Washington US Navy Lab, Catalina Island
1959: Hannes Keller presents his vision of a dive to a depth of 300 meters to Albert Bühlmann and Prof. Dr. P.H. Rossier, Director of the Medical Clinic of the University Hospital Zurich. Prof. Dr. P.H. Rossier gives Albert Bühlmann permission to participate in the project as a medical expert.