RedactedNarrative: Operator/ Owner states after circumnavigating Shelter Island and returning to his berth in Sag Harbor he was not in the channel but the mooring field outside of Sag Harbor Breakwater. Operator turned to starboard with the intention of heading back to the channel but instead ran through a clearly marked danger area striking submerged rocks. Vessel came to a stop and was grounded on said rocks taking on water. Sea Tow was called to assist in de-watering and tow the vessel into Ship A shore Marina for haul.