RedactedNarrative: VESSEL 1 WAS RETURNING TO WINTER HARBOR WHEN A VERY LARGE WAKE WENT OVER THE BOW AND SUNK THE BOAT.  4 PEOPLE WERE ON BOARD AND THEY WERE RESCUED BY SOMEONE ON A PONTOON BOAT THAT WAS IN THE AREA.  THE BOAT WAS ABLE TO BE PULLED OUT OF THE WATER BY THE OWNER/OPERATOR WITH THE HELP OF TOW BOAT US. THERE WAS NO BOAT INSURANCE. A WARNING WAS ISSUED FOR THE BOAT BEING OVERLOADED.  ONE PASSENGER WAS COMPLAINING OF A HEADACHE SO HE WAS SEEN BY WOLFEBORO FIRE PERSONNEL AND WAS TRANSPORTED TO HUGGINS HOSPITAL. HE WAS EVALUATED AND RELEASED WITH A MILD CONCUSSION. THERE WERE NO OTHER INJURIES.