Notice to Mariners – North Coast of Cornwall – Wave Hub Buoy Posted on October 1, 2013 at 12:00 am. This Notice cancels our previous Notice to Mariners issued on 20 September 2013: Please be advised that the Wave Hub SW special mark (charted position 50 deg 20.70’N 05 deg 37.24’W) previously reported missing has been located and is temporarily moored in position 50 deg 22.70’N 05 deg 28.75’W pending recovery. The buoy is a 3 metre diameter yellow steel structure approximately 4 metres high with a cross top mark. Mariners are advised to navigate in the area with caution.