on 8/13/12 at approximately 12:00 midnight vessel 1 was traveling south on the icw approximately 1/8 mile south of the new harrelson bridge. vessel was occupied with 5 people on board. while traveling south operator Operator turned around in the seat to work on his running lights and bilge pump. the boat moved to the left and struck 2 pilings of the old myrtle beach airforce base fuel docks. this caused all the passengers to go foward . occcpant1 to strike his head causing severe head injuries and falling into the water. he was recovered from the water and was given cpr by two people. the 4 year old passenger obtained two broken legs and a cut to his forehead. occupant3 received bumps and bruises. operator received a cut between his 2nd and 3rd toes and bumps and bruises. occupant4 obtained no injuries. vessel with passengers continued south to lauterdale bay condos and called 911. horry county ems transported all injured to grandstrand medical center for treatment.