The AGM-88 High-speed Anti-Radiation Missile (HARM) is an air-to-surface tactical missile designed to home in on electronic transmissions associated with surface-to-air missile radar systems. The missile was originally developed by Texas Instruments as a replacement for the AGM-45 Shrike and AGM-78 Standard ARM system. The AGM-88 is in service with the US Navy and Air Force.The AGM-88 can detect, attack and destroy a radar antenna or transmitter with minimal aircrew input. The proportional guidance system that homes in on enemy radar emissions has a fixed antenna and seeker head in the nose of the missile. A smokeless, solid-propellant, dual-thrust rocket motor propels the missile at speeds up to Mach 2. HARM, a Navy-led program, was integrated onto the A-6E, A-7 and F/A-18 initially and later onto the EA-6B. The Air Force introduced HARM onboard the F-4G Wild Weasel and later on specialized F-16 aircraft equipped with the HARM Targeting System.The HARM missile was approved for full production in March 1983 and deployed in late 1985. The newest upgrade is the AGM-88E Advanced Anti Radiation Guided Missile (AARGM). The AARGM will feature the latest software and enhanced capabilities, intended to counter radar shutdown.