RedactedNarrative: V1, a 24' Mastercraft, operated with three persons on board was heading east out of Admirals Cove Marina towards the Intracoastal Waterway. Operator noticed smoke coming from the stern of his vessel and began returning back to port. He noticed the smoke was intensifying and had all three occupants put on life vests. He then had all occupants abandon ship and jump into the water. All three occupants including operator swam to a nearby dock as the vessel became fully engulfed in flames. No injuries were reported. Cause of fire undertermined due to damage, believed to be engine related.