The two prototypes Tu-22M(0) were delivered to Long Range Aviation's 42nd Combat Training Centre at Dyagilevo (air base), near Ryazan, in February 1973. The aircraft began practice sorties in March. Within 20 days of the aircraft's delivery, the air and ground crew at the air base had received their type ratings; this was helped by their earlier training at Tupolev, the Gromov Flight Research Institute and the Kazan plant. In June that year, the aircraft were demonstrated to Soviet government officials, destroying tanks and armoured personnel carriers.