 The units based there were the 124.LAE (Fighter Aviation Squadron) and 125.LAE, both equipped with MiG-21bis fighter aircraft, and the 352.IAE (Reconnaissance Aviation Squadron), equipped with MiG-21R reconnaissance-fighter aircraft.The tunnels ran a total length of 3.5 kilometers, and the bunker had four entrances protected by 100-ton pressurized doors, three of which were customized for use by fixed-wing aircraft.Eventually, it was hoped that the base would be re-equipped with the indigenously developed Yu Supersonik aircraft.