
Sonar Safety System For Swimmers
Courtesy of WOWSA, Huntington Beach, California. At the 2011 FINA World Championships in Shanghai's Jinshan City Beach, FINA introduced high-tech sonar equipment from Japan as a means to keep athletes safe in the open water swimming championships. FINA invested US$300,000 in two sonar units that were used for the first time, sweeping the course every 20