While previous anti-radiation missile targeting systems were built into the launching aircraft, the AN/ASQ-213 is built into a pod that attaches to a wing weapons station on any aircraft with a MIL-STD-1553 electronic interface. It can, therefore, adapt the AGM-88 HARM missile to a wide variety of aircraft.
The ASQ-213, which is in its seventh version, detects radars at long range, and presents a complete radar threat profile to its human operator, who can prioritize targets to be engaged. It is considerably more precise than a radar warning receiver that merely indicates the presence of radar.
Its latest upgrade includes GPS reception, so it can integrate its situational display with that provided by other platforms, through the Joint Tactical Information Distribution System (JTIDS). The AN/ASQ-213 does not have as wide a coverage than did the built-in electronics on the predecessor F-4G aircraft, but can accept data from RC-135 RIVET JOINT, E-8 Joint STARS, and other JTIDS-equipped systems.
It remains most common on the F-16 Fighting Falcon series. The main U.S. version is the F-16CJ. Israel operates it on its F-16I aircraft.