a Honeywell EGI (Enhanced GPS Inertial Navigation System) and added digital electronic flight instruments (EFI). The Maverick Plus System (MPS) added the capability to employ the AGM-65E laser-guided or AGM-65F infrared-guided air-to-surface missile, and the AGM-84H/K Stand-off Land Attack Missile Expanded Response (SLAM/ER). The SLAM/ER is a GPS/inertial/infrared guided cruise missile derived from the AGM-84 Harpoon that can be controlled by the aircrew in the terminal phase of flight if an AWW-13 data link pod is carried by the aircraft. The S-3B saw extensive service during the 1991 Gulf War, performing attack, tanker, and ELINT duties, and launching ADM-141 TALD decoys. One such aircraft, launched from the aircraft carrier , was responsible for the destruction of an Iraqi Silkworm anti-ship missile site, having fired AGM-84 SLAM missiles at it. It was commonly deployed to hunt for Scud missile launcher. The Vikings also identified and targeted numerous Iraqi naval vessels, and even destroyed anti-aircraft gun emplacements and coastal radars. The Gulf War was the first event in which the type had been employed overland in offensive air strike capacity. The Viking also participated in the Yugoslav wars in the 1990s, and in Operation Enduring Freedom in the 2000s. For the latter, the opening phase of the War in Afghanistan in October 2001, many Vikings were deployed as tankers to continuously undertake refueling sorties to support various fighters stationed aboard U.S. carriers, giving them the necessary endurance to fly to and from the conflict zone. Electronic surveillance The first ES-3A was delivered during 1991 and entered front-line service after two years of testing. The U.S. Navy established two squadrons, each equipped with eight ES-3As, stationed in both the Atlantic and Pacific Fleets to provide detachments of typically two aircraft, ten officers, and 55 enlisted aircrew, maintenance and support personnel (which comprised/supported four complete aircrews) to deploying carrier air wings. The Pacific Fleet squadron, Fleet Air Reconnaissance Squadron FIVE (VQ-5), the "Sea Shadows," was originally based at the former NAS Agana, Guam but later relocated to NAS North Island in San Diego, California, with the Pacific Fleet S-3 Viking squadrons when NAS Agana closed in 1995 as a result of a 1993 Base Realignment and Closure (BRAC) decision. The Atlantic Fleet squadron, the VQ-6 "Black Ravens," were originally based with all Atlantic Fleet S-3 Vikings at the former NAS Cecil Field in Jacksonville, Florida, but later moved to NAS Jacksonville, approximately to the