RedactedNarrative: OPERATOR OF VESSEL WAS LEAVING THE GRINDSTONE HARBOR CHANNEL AND WAS GETTING UP TO PLANE WHEN HE STRUCK A SUBMERGED TREE THAT WAS A FEW FEET UNDER THE SURFACE OF THE WATER. OPERATOR COULD NOT SEE THE TREE UNTIL IT WAS TOO LATE. THE TREE STRUCK THE ENGINE CAUSING DAMAGE AND LETTING WATER IN. OPERATOR PUT HIS LIFE JACKET ON AFTER IMPACT AND WAS ABLE TO RETURN TO SHORE WHERE THE REPORT WAS TAKEN. NO INJURY, NO ALCOLHOL FACTOR.