RedactedNarrative: On May 25, 2021 at approximately 0418 hours, a 27 foot Ciera power boat collided with an underwater object east of Navy Pier at 600 E Grand Chicago, IL. The Ciera power boat (registration # IA6743BR) issued a mayday call and Chicago Police Department (CPD) Marine Unit M3 responded. The Ciera was able to make it to Navy Pier under its own power and CPD Marine Unit M3 helped control flooding until Tow Boat U.S. arrived. Tow Boat U.S removed the watercraft to Hammond Marina, 701 Casino Center Dr, Hammond, Indiana 46320. 
  
  On May 27, 2021 at approximately 3:19 PM, I contacted the operator and owner  to discuss the cause of the accident.  Operator told me that he had been watching the Skyline with the engine off. Operator realized he was drifting toward the break wall stern first and attempted to start the engine and move away from the break wall. Operator stated that he started to move the vessel when the watercraft struck a submerged object causing damage to the Ciera''s hull. 
  
  The Ciera''s hull cracked at the starboard stern portion of the vessel. On June 17, 2021 I contacted Operator to confirm the location on the break wall where the Ciera collided with the submerged obstacle and the estimated damage caused to Operator''s vessel. Operator was unsure of the exact location, but state he was directly east and slightly south of Navy Pier. Operator also stated that he was getting the Ciera repaired this fall and the quote for the repair was $7,500.00. No injuries were suffered during the accident.
  