Helicopters MH-53 Pave Low: The MH-53 Pave Low is a USAF version of the CH-53 Sea Stallion helicopter. The MH-53J Pave Low III heavy-lift helicopter is the largest, most powerful and technologically advanced helicopter in the 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. The MH-53M Pave Low IV is a J-model that has been modified with the Interactive Defensive Avionics System/Multi-Mission Advanced Tactical Terminal or IDAS/MATT. The system enhances present defensive capabilities of the Pave Low. It provides instant access to the total battlefield situation, through near real-time Electronic Order of Battle updates. It also provides 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. Under the Pave Low III program, the Air Force modified nine MH-53H's and 32 HH-53s for night and adverse weather operations. Modifications included forward-looking infrared, inertial global positioning system, Doppler navigation systems, terrain-following and terrain-avoidance radar, an on-board computer, and integrated avionics to enable precise navigation to and from target areas. The Air Force designated these modified versions as MH-53J's. MH-53 - MH-53 Pave Low helicopter MH-53J Pave Low Pave Low III Paving the way Rotor maintenance Preparing the Pave Low Blade check Globemaster lift Medical evacuation Out the back door 20th SOS Light show Fast rope Pave Low III Green Hornets MH-53 Pave Low helicopter, and Special Operations, 20 S.O.S. The Pave Low's mission is low-level, long-range, undetected penetration into denied areas, day or night, in adverse weather, for infiltration, exfiltration and resupply of special operations forces.