RedactedNarrative: Operator of vessel 1 stated he was attempting to anchor the vessel near Gulfport Harbor when wind blew his vessel close to rocks.  As he attempted to back vessel from rocks water came over transom and swamped vessel.  The vessel sank with both motors submerged and operator and four occupants swamp about forty feet to the shore.  Vessel Damage was fiberglass and both outboard motors.  Damaged value was $10,000.  All five subjects was checked by AMR and refused treatment.  No claim of injuries.