RedactedNarrative: V1 operator stated he and his family had stopped to discuss their plans for the day.  After talking about 5 minutes he took off from behind their vessel.  At the same time V2 was headed upstream on their port side.  Operator of V2 stated she saw V1 take off suddenly and that the operator was not looking and ran right into the side of V2.   Operator1 suffered pain to his leg and trunk after impacting the water.
  
  Damage to V1 included: fiberglass damage to the port side near the bow on the top cap and paint transfer to the port side on the hull.  V2 had fiberglass damage to the port side near mid-ship on the waterline and a small window on the port side was knocked loose due to damage to the frame.