RedactedNarrative: On the night of 09/08/2019, operator operated a 1986 Bayliner Cuddy Cabin from St. Mary's, WV to Williamstown, WV on the Ohio River.  He believes he struck an unknown object beneath the water.  THey stopped at the Williamstown boat ramp and stayed the night.  Upon waking, they discovered the vessel was taking on water.  After the vessel was removed, a hairline crack in the fiberglass was discovered near the stern of the vessel.