The US Navy, which still plans to field the long‑range anti‑radiation AARGM‑ER missile by the end of this year, has begun looking for a substitute or a comparable system. The move follows years of delays and technical problems in the missile's development. A new request for information (RFI) indicates the Navy wants a long‑range missile with an advanced anti‑radiation seeker, capability to defeat modern radar systems, and compatibility with F/A‑18E/F Super Hornet, EA‑18G Growler and F‑35 aircraft. Earlier versions of the program considered engaging radio‑emitting airborne targets such as Avax aircraft, but recent documents give this less emphasis.