RedactedNarrative: VESSEL 1 AND V2 WERE BOTH HEADING NORTH ON THE EAST SIDE OF THE ICW, NEAR THE 4300 BLOCK (HIGHLAND BEACH PD JURISDICTION).  V1 WAS IN FRONT OF V2, AND V2 ATTEMPTED TO OVERTAKE V1 ON V1'S STARBOARD SIDE.  AT THE SAME TIME, V1 ATTEMPTED TO VEER/MANEUVER TO HIS STARBOARD SIDE AND COLLIDED WITH THE PORT SIDE OF V2.  OPERATOR OF V1 ADVISED HE LOOKED PARTIALLY AND BRIEFLY BEFORE MAKING HIS MANEUVER BUT ADMITTED HE DID NOT FULLY VERIFY IT WAS CLEAR BEFORE DOING SO.