Vessel A departed Rockland Harbor approx 1030 hours, headed south down Mussel Ridge Channel to White Head. Set auto pilot to approx 230 degrees from White Head towards Mosquito Island, St George, at approx 22 knots. At approx 1130 hours stepped to the stern of the vessel to secure cargo, while continuing at current course and speed. While not maintaining a proper look out Vessel A struck "MP" safe water navigational buoy located east of Mosquito Island. Operator thrown to the deck of the vessel, sustained minor injuries. Operator observed large hole in bow of vessel and taking on water. Headed to East side of Mosquito Island and decided to ground out the vessel to avoid sinking, and call for help.
St George