APG-78
The AN/APG-78 is a U.S. Army millimeter wave radar system shared among the Longbow versions of the AH-64 Apache heavy attack helicopter, AGM-114 Hellfire missiles, and the OH-58 Kiowa Warrior scout helicopter. The systems continue technical evolution, and, in August 2005, an upgrade Fire Control Radar Electronics Unit (REU) as part of the US Army's Apache Longbow Block III modernization effort.
In addition to the U.S., these helicopters and missiles are used by Greece, Kuwait, Israel, Japan and Singapore.
The REU has more expansion capability, including the MQ-8 Army Fire Scout unmanned helicopter, which is the Future Combat Systems (FCS) Class IV Unmanned Aerial Vehicle of the Reconnaissance, Surveillance and Target Acquisition Squadron (Brigade Combat Team).
