V2 WAS AT ANCHOR NEAR PICKLES REEF, AROUND 3 MILES SE OF KEY LARGO.  THERE WERE 2 PERSONS ON BOARD V2 AND 3 PERSON SCUBA DIVING APPROXIMATELY 150 FEET FROM V2.  THE MIDDLE DIVER WAS NOT ALL THE WAY TO THE BOTTOM AND WAS STRUCK BY AN UNKNOWN VESSEL (V1).  THE OTHER TWO DIVERS SURFACED AND SAW V1 LEAVING THE SCENE.  THE TWO SUBJECTS ON V2 DID NOT WITNESS THE ACCIDENT.  THE INJURED DIVER WAS BROUGHT TO V2 AND TAKEN TO THE MARINER'S CLUB AT MILE MARKER 97 WHERE EMS ARRIVED AND STABILIZED THE INJURED DIVER.  THE DIVER WAS MEDIVAC TO JACKSON MEMORIAL HOSPITAL TRAUMA CENTER FOR SURGERY.  A BOLO WAS PUT OUT FOR V1 BUT HAS NOT BEEN LOCATED YET.
KEY LARGO                     