chiefs' mess (again). This second attack killed an officer and wounded other sailors. As the aircraft turned to make a third pass, one of the ship's gun turrets fired five rounds and the aircraft turned and retreated. Fourteen minutes later Edson, now at general quarters due to reports from Hobart about hostile aircraft in the area, came under attack by an unidentified aircraft. Lookouts and sonar confirmed a near miss astern by a missile. The next day Vice Admiral William F. Bringle, Commander Seventh Fleet, appointed Rear Admiral S. H. Moore, Commander Task Group 77.1/70.8, to conduct an informal investigation into the various firing incidents occurring between 15 and 17 June. The board determined that Air Force F-4s launched two AIM-7E Sparrow missiles on 17 June at 01:15 and one at 03:15 that same day. Fragments of Sparrow missiles complete with serial numbers found on Boston and Hobart confirmed these findings. The case was therefore quite clear with regard to these two attacks on 17 June — Hobart and Boston had been the victims of friendly fire. The board also investigated the 16 June attacks on Boston and PCF-19 and the attack on Edson on the 17th. From the positions of American vessels and attacking aircraft, the board concluded that Air Force aircraft attacked Boston and PCF-19 on the 16th and that American aircraft also attacked Edson on the 17th. Unlike the Boston and Hobart attacks on the 17th, however, no physical evidence supported these findings. Later research of the incident with surviving veterans and a review of salvage reports from , the ship that recovered the bodies and codebooks from PCF-19 shortly after the attack, found that the rocket entry holes in the hull of PCF-19 were 76.2mm in size—the size of a standard helicopter rocket carried by a Soviet-manufactured Mi-4 Hound helicopter and not Sparrow or Sidewinder holes, which would have been larger. In training The most frequent training area for the Mare Island units was the marshland that forms the northern shoreline of San Francisco Bay. This area, now known as the Napa Sonoma Marshes State Wildlife Area, was also used by United States Navy Reserve unit PBRs) up until 1995, when Mare Island was scheduled for base closure. In service of the Vietnam People's Navy The Vietnam People's Navy managed to capture 107 of Republic of Vietnam Navy PCFs after the Fall of Saigon in 1975.