Reduced Gradient Bubble Modeling - a Decompression Resource for the Scuba Diver. Site of Dr. B.R. Wienke

The history of national dive training in the United States began with the development of the YMCA Scuba Program. As divers and instructors, we have dedicated ourselves to the quest for ever-better ways to teach others to enjoy the underwater world. That is our heritage. Throughout the history of sport diving, YMCAs have maintained unsurpassed standards. Those standards have changed as our knowledge and depth of experience have changed. Others have followed. That is our record. The first instructors, certified in Chicago, Ill., in 1959, provided the dedication and knowledge that became our tradition. We now have trained divers throughout the world and helped to form other dive-training organizations. Throughout our history we have worked tirelessly to improve diver safety and enjoyment with a parallel sense of responsibility toward the underwater world which we explore.