Aviation News – The U.S. Army’s legacy ISR turboprop fleet—including the RC-12X Guardrail, MC-12S EMARSS, and EO-5C ARL-M—will be succeeded by the jet-powered High Accuracy Detection and Exploitation System (HADES).
For more than 50 years, the Army relied on its aerial intelligence, surveillance, and reconnaissance (A-ISR) turboprop aircraft to support operations worldwide. In July, the Airborne Reconnaissance Low-Multifunction (ARL-M) and Guardrail aircraft flew their final missions over Korea, ending 54 years of continuous A-ISR support on the peninsula. The transition concluded in September when the Enhanced Medium Altitude Reconnaissance and Surveillance System-Multiple Intelligence (EMARSS-M) aircraft completed its last operational flight, officially closing the chapter on the legacy fleet.
The retiring turboprop platforms provided persistent intelligence collection using onboard sensors and analysts to deliver real-time battlefield awareness. Their replacement, the High Accuracy Detection and Exploitation System (HADES), is being built on the Bombardier Global 6500 business jet, offering greater range, altitude, and speed. The shift allows the Army to bolt modern intelligence systems onto a faster, more survivable airframe suited for future operations.
“The retirement of the legacy fleet and the move to HADES represent a decisive step forward in how the Army conducts aerial intelligence,” an Army aviation official said, noting the importance of adapting platforms to meet emerging threats.
The first Bombardier Global 6500 aircraft for HADES was delivered to the Fixed Wing Project Office last year, with a second aircraft arriving in July. The Army expects the first fully developed HADES prototype in fiscal year 2026, followed by a second prototype in fiscal year 2027, as testing and integration continue.
This transition closes a historic chapter in Army aviation while opening a new era of advanced intelligence collection. As HADES moves closer to operational service, the Army aims to enhance battlespace awareness with faster, higher-flying platforms designed for the demands of modern conflict.
