RedactedNarrative: V1 WAS TRAVELING SOUTH EAST ENTERING INTO JOHNS PASS UNDER POWER. THE OPERATOR WAS UNAWARE OF THE SHOAL TO THE NORTH AND WAS ATTEMPTING TO ENTER AT NIGHT. V1 BECAME GROUNDED ON THE SHOAL WHICH THEN CAUSED FLOODING ONCE IT WAS UNABLE TO POWER OFF THE SHOAL. THE OPERATOR AND OCCUPANT WERE UNABLE TO KEEP UP WITH THE FLOODING AND ONCE THEY WERE SAFELY OFF THE VESSEL, IT CAPSIZED.