OJ0YL & OJ0W Märket Reef DXpedition September 20–26, 2025Between Finland and Sweden lies Märket Reef, a rocky outpost that has captured the imagination of DXers for decades. With skilled operators and powerful gear, Märket Reef will definitely be heard — far and wide. OJ0W OJ0YL Market Reef DX Pedition Logo. OJ0W OJ0YL. Where is Market Reef located.