Sailing from JYC, Adonaijah Fortescue competes in the GP dinghy circuit. Adonaijah's competitive record on SailingSA begins in December 2025. Since then 24 races across 2 regattas have been completed. Adonaijah's primary class has been Optimist A, with additional appearances in other fleets. Adonaijah's best results include winning the SailingSA events in the multiple fleets fleet, as well as the SailingSA events in the multiple fleets fleet. Adonaijah remains an active competitor in the Western Cape sailing circuit.