Few places test a fighter pilot as severely as the Himalayas. The Indian Air Force (IAF) will conduct a major week-long air exercise close to the Line of Actual Control (LAC) in Uttarakhand from November 13 to 21. Airspace has also been reserved over the mountainous region spanning Jammu and Kashmir, Ladakh and Himachal Pradesh, as well as over the plains of Punjab.Frontline fighters, including the Sukhoi-30MKI and Mirage-2000, are expected to participate in the aerial wargames. Transport aircraft such as the An-32 and C-295 will also join the exercise, along with Mi-17 helicopters. The drills are aimed at assessing the IAF’s ability to execute complex missions in high-altitude terrain while maintaining a rapid-response posture along India’s northern frontier.
A hostile flying environment
The exercise will cover a strategically important stretch of the central Himalayan border, where rugged mountains, narrow valleys and unpredictable weather make military aviation particularly challenging. At high-altitude airbases and elevations exceeding 20,000 feet, aerodynamic performance, weapon effectiveness and aircraft survival margins all deteriorate.Strong winds striking mountain ridges at right angles can generate severe turbulence and violent updrafts and downdrafts. Moist air rising from valleys can freeze on aircraft surfaces, adding weight and disrupting wing aerodynamics. Weather conditions in deep valleys can also change rapidly, with clear skies giving way to blizzards within minutes. Temperatures can plunge to -40°C, thickening hydraulic fluids, draining batteries and making engine starts at forward bases increasingly difficult.The terrain itself presents another challenge. Mountain peaks and deep valleys create radar blind spots, allowing aircraft, drones and air-defence systems to remain concealed until the last moment. Thinner air also changes the way bombs and missiles behave. Reduced drag alters their trajectories, while missiles and guided bombs that rely on dense air to generate control forces through their fins can become less manoeuvrable at extreme altitudes. For a pilot forced to eject, the dangers are equally severe. Lethal cold, hypoxia and glaciated terrain can make survival difficult, while search-and-rescue helicopters may struggle to reach the crash site.
What the exercise will test
The drills are expected to assess the IAF’s ability to sustain combat operations, coordinate aircraft movements and make effective use of forward operating locations and supporting infrastructure. Such exercises also help validate operational concepts for rapid deployment and force projection in mountainous terrain.Advanced Landing Grounds (ALGs) will be a key part of this operational framework. These remote airstrips enable the faster movement of personnel, equipment and supplies across otherwise inaccessible terrain. The IAF recently landed an IL-76 transport aircraft at the forward airfield in Nyoma, around 35 km from the LAC. The ability to rapidly move forces and supplies between valleys remains central to maintaining operational readiness in the Himalayas.For civil aviation, the impact is expected to be limited but noticeable. A Notice to Airmen (NOTAM) is an official advisory informing pilots and airlines about temporary airspace restrictions or special activities. During the exercise, some civilian flights may have to alter their routes depending on the airspace allocated for military operations. Airlines are expected to coordinate closely with the authorities to minimise disruption.
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