The MKIII Dual Antenna System has been used extensively in swimming events where the finish line is on the beach. The dual antenna system has been used for the last 6 years at the annual Rottnest Channel Swim which boasts a field size of over 2000 swimmers. This system was also used in February 2008 to time the Midmar Mile in South Africa which is the world's largest open water swim with over 17,000 competitors. The RFID Race Timing System was also used for the first time in 2008 to time the Lorne Pier to Pub which is the largest open water swim in Australia with 4500 swimmers.