Marthinus Groenewald sails out of UNK in the the region. Marthinus's earliest SailingSA result dates to February 2025. Since then 2 races across 1 regattas have been recorded. Marthinus competes mainly in the Miura fleet, alongside races in other fleets. Highlights include winning the 2025 Mykonos Offshore Regatta in the Miura fleet, along with the 2025 Mykonos Offshore Regatta in the Miura fleet. Marthinus remains active in regional dinghy racing.