RedactedNarrative: V-1 with four persons onboard were engaged in fishing at anchor on a 18ft center console vessel at or near Intracoastal Waterway channel marker 17. Upon pulling anchor and preparing to get underway the vessel began taking on large amounts of water over the stern due to drain plug failure. As the vessel left shallow waters for deeper, the vessel was swamped and capsized causing four persons to be ejected. All were recovered uninjured.