RedactedNarrative: V1 WAS DRIFTING WITH LIGHTS ON IN THE CHANNEL. V2, ALSO WITH LIGHTS ON, CAME TOWARD V1.  V2 STRUCK THE SWIM PLATFORM, RODE OVER THE GUNWALE AND OFF TO THE SIDE OF V1.  THE IMPACT CRACKED THE HULL OF V1, PULLED THE GRAB RAILING OUT OF V1 AND SEVERED THE RUB RAIL INSERT AND RUB RAIL.  V2 LEFT THE AREA.