RedactedNarrative: According to occupant and operator statements, they were traveling in the channel headed north bound when the struck something in the water that caused the engine to quit working. They began traveling back towards the ramp, utilizing the trolling motor and after some time had passed noticed that water was coming in through the floor of the vessel. The vessel subsequently capsized and they swam to a nearby dock. Operator contacted me on the following day(7/11/2018) and stated they were going to remove the vessel from the water. I arrived as they were pulling it up to the ramp, the vessel was still overturned and one could see a location on the hull where a  piece of gel coat and fiberglass were missing. It appears this location was compromised when they struck the unknown object and allowed water into the hull.