RedactedNarrative: Vessel 1 was tied to the dock in its slip at Harbor Point Marina in Carolina Beach.  (vessel 1) was in the engine room working on the starboard engine.  V1 subject started the starboard engine from the engine room not knowing that the throttle controls were in the 3/4 throttle position.  When the starboard engine started, the vessel pulled away from the dock breaking all lines holding the vessel.  The last line to break was the bow starboard line, which caused the vessel bow to turn towards the starboard piling, and when the line broke, vessel 1 was turning to the starboard side and the port stern corner impacted vessel 2 at the Master Bedroom porthole and just below the port hole.
  
  Vessel 2 was tied to the dock in its slip at Harbor point Marina in Carolina Beach.  No one was on board the vessel at the time of the incident. The owner was standing on the dock talking to (witness) at the time of the incident.
  
  Vessel 1 suffered minor damage to the port stern corner to consist of paint transfer and minor scuffs.
  
  Vessel 2 suffered major damage to the starboard side of the vessel at the porthole for the master bedroom. The porthole was pushed into the bedroom and there is a crack all the way through the fiberglass into the bedroom approximately 2 foot in length.