The company that launched “anti-shark wetsuits” last year is now developing a buoy to alert lifeguards of the presence of sharks. Shark Mitigation Systems, together with Optus, is developing shark detection technology which uses sonar to scan the water for shark-like objects. A 25-kg buoy would communicate with sonar transducers mounted on a frame on the seabed. An alert would be sent via satellite to lifeguards. Such a method would alleviate the need for shark culling procedures.