Crazy Horse
Guardrail South

The Crazy Horse system, also known as Guardrail South, was developed to provide a capability to locate unique electronic emissions in Central America. Sanders Associates, Inc was contracted to install the mission equipment on a total of 3 modified Beechcraft King Air A200CT aircraft, subsequently designated as RC-12G. The resulting configuration was similar to the Improved Guardrail V system fitted to similarly modified RC-12D aircraft.

The system was first fielded in 1985 and deployed to Honduras in 1986 to support US Southern Command (SOUTHCOM) and Joint Task Force Bravo (JTF-B). The aircraft served in the region supporting counterinsurgency and counterdrug operations until 1993, when the aircraft were transferred to the 138th Military Intelligence Company (Aerial Exploitation) in Orlando Florida, which transitioned from the older Cefirm Leader system. The system continued to be used to support counterdrug operations in the SOUTHCOM area of responsibility. The last Crazy Horse mission was flown on 30 September 1998 and the remaining systems were moved to storage at Fort Sill, Oklahoma on 12 October 1998.