BEACH users moved by the high number of drownings on Mornington Peninsula’s notoriously dangerous back beaches have started a petition calling for “urgent action” to improve safety. The Mornington Peninsula Back Beaches Collective is directing the petition to Parks Victoria through Environment Minister Steve Dimopoulos, following a summer marked by drownings and water incidents.In February 20-year-old Cranbourne man and promising athlete Jona Kinivuwai was pulled out to sea by a rip while in the shallows at Rye back beach. His body has still not been found. One of the petition organisers, Rye surfer Drew Cooper, said it was another tragedy…