RedactedNarrative: VESSEL 1 BEING OPERATED FROM LINCOLNVILLE TO TARANTINE YACHT CLUB ISLESBORO. VESSEL 1 DEPARTED HEADING EAST AT APPROXIMATELY 2015 HOURS. NAVIGATION ELECTRONICS REPORTED NOT WORKING. VISUAL NAVIGATION AT DUSK/NIGHT. VESSEL PASSED BETWEEN NORTH END OF SPRUCE ISLAND AND NAVIGATION AID G "7" STRIKING THE SUBMERGED LEDGE BETWEEN. VESSEL 1 SPEED WAS ON PLANE APPROXIMATELY 12-15 MPH. ASTRONOMICALLY LOW TIDE OCCURRING.  