RedactedNarrative: WHILE THE VESSEL WAS UNDERWAY, THE OPERATOR FAILED TO KEEP A PROPER LOOKOUT AND DID NOT SEE A LARGE PIECE OF WOOD FLOATING AT THE WATER LINE.  HE STRUCK THE WOOD, WHICH CAUSED A CRACK IN THE HULL AND DAMAGED PROPELLER.  THE BILGE PUMP WAS UNABLE TO PUMP OUT THE WATER AS QUICKLY AS IT WAS COMING IN, SO IT PARTIALLY SUBMERGED.