RedactedNarrative: EPOs were dispatched to respond to Charlestown involving a boat that ran aground in the vicinity of Charlestown Breachway.  The boat had struck rocks while traveling along the beach.  When EPO’s arrived; the vessel, a 65-ft motor yacht, was anchored outside of the breachway.  EPO \ boarded the boat and spoke with Safe Sea and USCG who advised that the boat had significant damage to the propeller and rudder.  EPO \ then spoke with the owner/operator, who stated that he was operating his boat along the shore when he struck a rock.  He said he did not observe any rocks marked on the chart.  All four passengers were uninjured and put on their life jackets after the incident occurred.