RedactedNarrative: THE 4 PASSENGERS WERE ANCHORED ON LAKE DELTON TO WATCH THE SUN SET. THE OPERATOR DROPPED ANCHOR AND TIED OFF WITH ABOUT 10 TO 12 FEET OF LINE OUT. THE OPERATOR TIED OFF ON THE PORT SIDE OF THE BOAT TO A CLEAT THAT WAS ROUGHLY IN LINE WITH THE REAR BENCH SEAT. AFTER DECIDING TO GO UNDER WAY, THE OPERATOR FORGOT TO PULL THE ANCHOR. THE BOAT HAD HAD JUST STARTED TO GET UP ON PLANE HAVING TRAVELED AN UNKNOWN DISTANCE WHEN THE ANCHOR SWUNG UP OUT OF THE WATER AND HIT occupant IN THE HEAD. occupant WAS SEATED IN THE CENTER OF THE REAR BENCH SEAT.