Soldiers from the 24th Air Base at Krumovo inspected the ship ABLE and found no drone remains, because everything on board is burnt. A check of the cargo showed the vessel was carrying wheat.
The military says the fire was very severe and did major damage. The frigate Verni is also taking part in the mission.
The ship has holes in its stern and has taken on water. It is stable for now, but it is not clear whether it will sink. The Navy said there is no spill around it. ABLE is now about 55 miles from Cape Emine.
The crew left the ship using the emergency and rescue equipment it had on board.
Earlier today, the military destroyed another drone 15 miles east of Sinemorets, the Navy said.