RedactedNarrative: A male was observed aboard a docked vessel 1. The vessel's engines were started and a loud bang was then heard.  Law enforcement was called.  Upon arriving at the scene, law enforcement observed an operator on the vessel 1 which was fully underpower while tied to the dock. Vessel 1 was forcefully against the dock, while the starboard side was forcefully against a docked vessel 2. 
  
  Law enforcement approached vessel 1, and the operator appeared from the cockpit of the vessel 1. The operator stated he needed help and he was the deckhand of vessel 1. He said no one else was on the vessel. The operator was assisted off the vessel. Law enforcement detected the odor of alcohol and that he was unsteady on his feet. The operator was placed under arrest. No injuries.