OPERATOR OF VESSEL 1 CRUISING WESTERLY, SOUTH OF GRASS LEDGE. OPERATOR REDUCED SPEED FROM APPROX 20 KPH TO 5 KPH WHEN HE STARTED TO REALIZE HIS POSITION AS INDICATED ON VESSEL 1 PLOTTER MAY NOT BE ACCURATE. VESSEL 1 STRUCK SUBMERGED ROCK INDICATED TO THE SOUTH OF GRASS LEDGE. COLLISION RESULTED IN GROUNDING UNTIL HIGH TIDE FLOATED VESSEL 1 FREE OF THE ROCK.
North Haven                   