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The EF-111A Raven electronic warfare variant. Its crews and maintainers often called it the “Spark-Vark”, a play on the F-111’s “Aardvark” nickname. The EF-111 entered service in 1983 and served until its retirement in 1998. Afterwards, the Air Force began depending on Navy and Marine Corps EA-6Bs for electronic warfare support. In the late 1960s, the U.

1972, decided to modify F-111As into electronic warfare aircraft as a cost effective option. Grumman was selected as the EF-111 prime contractor in December 1974, then was awarded a contract to modify two F-111As into EF-111 prototypes in January 1975. The first fully equipped model, known then as the “Electric Fox”, flew on 10 March 1977. The first EF-111s were deployed in November 1981 to the 388th Tactical Electronic Squadron, Mountain Home AFB, Idaho. The last was delivered in 1985. APQ-160 radar primarily for ground mapping.

E jamming system, developed from the Navy’s ALQ-99 on the Prowler. Receivers were installed in a fin-tip pod, or “football”, similar to that of the EA-6B. The aircraft’s electrical and cooling systems had to be extensively upgraded to support this equipment. The cockpit was also rearranged, with all flight and navigation displays relocated to the pilot’s side, and flight controls except throttles being removed from the other seat, where the electronic warfare officer’s instrumentation and controls were installed.

Its speed and acceleration were its main means of self-defense. Pacer Strike program for the F-model. Cockpit displays were upgraded with multi-function displays. The EF-111A achieved initial operational capability in 1983. The EF-111A received the official popular name Raven, although in service it acquired the nickname “Spark ‘Vark”. Operation Desert Storm in 1991. EF-111 family to achieve an aerial victory over another aircraft.