HAL aims to indigenously develop 12-ton class IMRH with a service ceiling of around 20,000 feet, 3,500 kg payload and a seating capacity of 24, the Defence PSU said.
The major tasks the chopper can perform include tactical troop transport, casualty evacuation, under slung load, combat search and rescue, anti-surface operations, off-shore operations, VIP/VVIP transport and air ambulance.
The army/IAF version will have a significant hovering and payload capability especially at high altitude, HAL said in a statement.
The proposed IMRH will be powered by twin engines, equipped with automatic flight control system, state-of-the- art mission systems, advanced cockpit display and avionic systems to meet the utility and armed roles of Indian armed forces.
A dedicated Naval variant is also planned, the statement said.
Besides the domestic defence orders, HAL will target export orders, aiming to replace the ageing fleet of similar class of helicopters that are operational in more than 40 air forces around the world, the release said.