Sailing from WYAC, Petrus van der Merwe competes in the Mpumalanga dinghy circuit. Petrus's competitive record on SailingSA begins in March 2025. Since then 10 races across 1 regattas have been completed. Most of Petrus's racing has been in Hunter, with additional starts in other fleets. Key performances include winning the SailingSA events in the multiple fleets fleet, along with the SailingSA events in the multiple fleets fleet. Petrus continues to compete regularly across provincial and national sailing events.