RedactedNarrative: Vessel #1 was cruising (recreational) in the gulf of mexico in an area just south of the entrance channel to the pithlachascotee river (city of port richey.) At one point, vessel #1 was on a southerly course and entered an area of severely shallow water (approximate position 28-16.949 n 1082-46.070 w. The vessel's draft exceeded the maxim depth of water and the vessel ran aground causing underside damage to the vessel's hull. The vessel began taking on water very quickly and the forward cabin began filling with water. The vessel was immovable due to being aground and the persons onboard were transferred to a passing vessel (uninjured) prior to law enforcement's arrival.