On 5 November 1957, Gagarin was commissioned a lieutenant in the Soviet Air Forces having accumulated 166 hours and 47 minutes of flight time. He graduated from flight school the next day and was posted to the Luostari Air Base close to the Norwegian border in Murmansk Oblast for a two-year assignment with the Northern Fleet. On 7 July 1959, he was rated Military Pilot 3rd Class. After expressing interest in space exploration following the launch of Luna 3 on 6 October 1959, his recommendation to the Soviet space programme was endorsed and forward by Lieutenant Colonel Babushkin. By this point, he had accumulated 265 hours of flight time. Gagarin was promoted to the rank of senior lieutenant on 6 November 1959, three weeks after he was interviewed by a medical commission for qualification to the space programme.