A KwaZulu-Natal sailor, Mark Flack represents HMYC in competitive dinghy racing. Since January 2025, 37 races across 5 regattas have been recorded for Mark. Most of Mark's racing has been in Mirror, with additional starts in other fleets. Notable results include victory at the 2025 Hmyc Grand Slam Multihull Final in the Mirror fleet and strong finishes at the 2025 Hmyc Grand Slam Multihull Final. Mark continues to compete regularly across provincial and national sailing events.