UNIT 1 & 2 WERE RENTAL SKIS FROM ACTION WATER SPORTS. BOTH SKIS WERE TRAVELING SEPARATE DIRECTIONS ON THE ICW IN HORRY COUNTY IN FRONT OF PARADISE ISLAND UNIT 2 TURNED TO "SPLASH" UNIT #1 AS UNIT 1 CHANGED DIRECTION AND STRUCK UNIT 1 IN THE HULL OF the RIGHT SIDE PUNCTuRing a HOLE which SANK the VESSEL, TWO RIDERS ON UNIT 1 WENT IN WATER