www.perthnow.com.au/news/wa/new-clever-buoy-shark-detection-system-set-to-begin-at-city-beach-ng-a842250804551b48172db20b55ecf91c Saw these things today, they are MASSIVE! about 10 foot high, i think because they have solar panels attached to them.
Cost $33 million.
They are about 300 metres from each other so I assume it has a range of about 150 metres.
