RedactedNarrative: On Sunday, 09/24/2017, at approximately 8:00 PM, vessel 1 (2003 Rinker) entered 31st St. Harbor after a rental outing on Lake Michigan.  According to the owner of the vessel, Operator1 had rented the vessel through a 3rd-party rental service called BoatBound.  When Operator1 attempted to return to the dock of origination, he lost control of the vessel.  As a result, Operator1 ran the stern of the vessel into a docked catamaran (vessel 2).  According to a witness at the scene, Operator1 reversed the vessel in-between the two pontoons of the docked catamaran, impacted the interior of the starboard pontoon, then impacted a support beam before driving the vessel away from the catamaran.  
  
  According to Witness, the vessel seemed to "bounce around" inside the platform area of the catamaran, creating an "awful clanking noise".  Witness is an employee of the Care-Free Boat Club, a rental boat service located in 31st St. Harbor.  Witness also assists the owner of the vessel, with his rental services.  Witness stated he noticed Operator1 having a difficult time maneuvering the vessel into position at the dock.  Witness then boarded the vessel and docked the boat.  Witness stated Operator1 and the three passengers on board were all "wasted" and there were more than two cases of alcoholic beverages on board.  After docking the vessel, Witness stated all four occupants quickly grabbed their belongings and left the dock.
  
  According to owner, vessel 1 sustained damage to the hull and center windshield as a result of the accident.  As of 09/25/2017, no official damage assessment has been done for vessel 1.
  
  As of 09/25/2017, after numerous attempts, neither owner nor I have been able to make contact with Operator1.
  
  On 09/25/2017, I made contact with owner/operator of the catamaran (vessel 2).  He and I examined the damage to the catamaran and He estimated the damage to exceed $5,000.  The damage included numerous cracks to the composite of the starboard pontoon, as well as a broken support beam coming off the platform at the bow of the catamaran.
  