RedactedNarrative: Vessel 1 docked with lines secured within Yacht Club with engines running and owner down in the galley. Carbon monoxide alarms going off alerted near by patrons on the marina. Upon their arrival to the vessel they observed the owner unresponsive on the floor within the galley. EMS notified, responded and subsequently pronounced owner deceased. Further inspection / investigation by WCPD Marine Unit and investigative personnel revealed that the vessel exhaust vent was not functioning properly.