RedactedNarrative: UNIT 1 WAS TRAVELING NORTH ON THE STONO RIVER NEAR LIMEHOUSE LANDING.  UNIT 2 WAS TRAVELING SOUTH ON THE STONO RIVER.  BOTH UNITS WERE APPROACHING HEAD ON.  UNIT 1 BEGAN TURNING STARBOARD.  UNIT 2 TURNED TO PORT AND COLLIDED WITH UNIT 1.  UNIT 2 STATED THAT HE WAS GOING IN EXCESS OF 50 MPH WHEN THE COLLISION OCCURRED.