RedactedNarrative: Vessel was traveling North in the area of Salt Rock Reef approaching Cos Cob Harbor when the vessel struck a submerged object. The vessel's starboard shaft got dislodged from the hull and the vessel took on water at a high rate of speed. The vessel was dewatered with a pump by the police dept and towed to a marina. The vessel sunk at the dock. No injuries. Vessel was a total loss.