at the base in 1940, but left due to mission realignments and a reduction in Marines authorized for Marine Corps Security Force duties at U.S. Naval installations. Force reductions continued in the 1990s and early 2000s with the elimination of P-3 squadrons (VP-24, VP-49, VP-56) and H-60 squadrons (HS-1, HS-9, HS-75). With the BRAC-directed closure of NAS Brunswick, Maine by mid-2011, Patrol Squadron EIGHT (VP-8), Patrol Squadron TEN (VP-10), Patrol Squadron TWENTY-SIX (VP-26), Special Projects Patrol Squadron ONE (VPU-1) and Fleet Logistics Support Squadron SIXTY-TWO (VR-62) began relocating to NAS Jacksonville in 2007 with their P-3 and C-130T aircraft, with all of these squadrons in place at NAS Jacksonville by late 2010. Current operations The installation is one of the central hubs for naval activity in the U.S. South, with over 50,000 civilian employees, contractors and active-duty personnel employed. NAS Jacksonville is home to Patrol Squadron THIRTY (VP-30), the Navy's largest aviation squadron and the only P-3 Orion and P-8 Poseidon Fleet Replacement Squadron that prepares pilots, air crew and maintenance personnel for operational assignments in the P-8A, P-3C, and EP-3E Aries in the U.S. Navy, and P-3B, P-3C and similar variants in various NATO and Allied navies and air forces. In addition, NAS Jacksonville is home to Naval Hospital Jacksonville, under Navy Medicine, which supports all medical programming across naval installations in Florida, including providing the command structure for five Base Health Clinics (BHCs) from Jacksonville to Key West. Finally, support facilities at NAS Jacksonville include its being an Aviation Maintenance training facility for several aviation ratings (facilitated by the Center for Naval Aviation Technical Training Unit Jacksonville), an additional outlying field (OLF Whitehouse) for pilot training, a maintenance depot employing more than 150 different trade skills capable of performing maintenance as basic as changing a tire to intricate micro-electronics or total engine disassembly, a Fleet Industrial Supply Center, a Navy Family Service Center, a DeCA commissary, Navy Exchange, and recreational facilities for both single sailors and families of the Active, Reserve and Retired military communities. NAS Jacksonville houses a facility to train pilots for the Northrop Grumman MQ-4C Triton. In addition to that NAS Jacksonville has trained foreign aircrews including that of Royal Australian Navy's New Squadron 725. Fleet Readiness Center Southeast Fleet Readiness Center Southeast is the Naval Air Systems Command (NAVAIR) maintenance, repair and operations depot for NAS Jacksonville. The depot was originally founded as Naval