In the mid 1990s a MH-53 Pave Low IV at LIRH Frosinone the Italian helicopter training base.
From Wikipedia:
The MH-53J Pave Low III helicopter was the largest, most powerful and technologically advanced transport helicopter in the US Air Force inventory. The terrain-following and terrain-avoidance radar, forward looking infrared sensor, inertial navigation system with Global Positioning System, along with a projected map display enable the crew to follow terrain contours and avoid obstacles, making low-level penetration possible.
Under the Pave Low III program, the Air Force modified nine MH-53Hs and 32 HH-53s for night and adverse weather operations. Modifications included forward-looking infrared, inertial navigation system, global positioning system, Doppler navigation systems, APQ-158 terrain-following and terrain-avoidance radar, an on-board mission computer, enhanced navigation system, and integrated avionics to enable precise navigation to and from target areas. The Air Force designated these modified versions as MH-53Js.
The MH-53J's main mission was to drop off, supply, and pick up special forces behind enemy lines. It also can engage in combat search and rescue missions. Low-level penetration is made possible by a state-of-the-art terrain following radar, as well as infrared sensors that allow the helicopter to operate in bad weather. It was equipped with armor plating. It could transport 38 troops at a time and sling up to 20,000 pounds (9,000 kg) of cargo with its external hook. It was capable of top speeds of 165 mph (266 km/h) and altitudes up to 16,000 feet (4,900 m).
The MH-53M Pave Low IV was modified from the MH-53J configuration with the addition of Interactive Defensive Avionics System/Multi-Mission Advanced Tactical Terminal or IDAS/MATT. The system enhanced the defensive capabilities of the Pave Low. It provided instant access to the total battlefield situation, through near real-time Electronic Order of Battle updates. It also provided a new level of detection avoidance with near real-time threat broadcasts over-the-horizon, so crews can avoid and defeat threats, and replan en route if needed.
