The trainee was sitting in the left seat and wearing blue glasses. An orange plexiglass panel was placed in front of him on the left side of the windshield to prevent seeing outside as part of instrument training. The supervising instructor was on the right. According to meteorological data, at 15:00 the sky over Ankara, clouds were present with a lower boundary of 3000 feet (910 m), visibility was 10-20 kilometers. The flights collided over Ankara at 7,000 feet in good weather. The C-47 departed Etimesgut at 11:22 GMT; the instrument training flight flew a route southeast of the Golbashi radio beacon for lasted an hour and a half, after which the pilots headed back to Etymesgut, following visual flight rules. The flight was intended to last 1 hour and 30 minutes. Flight 265 radioed Esenboğa at 13:04 GMT to inform air traffic control it would descend from flight level 185 to 105 and would pass Golbasi at 13:07. Flight 265 was given permission to descend to 6500 feet at 13:05. Air traffic control ordered Flight 265 to report when they began descent for landing on runway 03. The altimeter setting was 1015.5 mb. Flight 265 reported descending to 6,500 ft and would radio when reaching the Ankara beacon; it was descending from flight level 125 intended to radio when reaching flight level 105. At 13:07 GMT the aircraft reported altitude at flight level 100, and asked it they needed to enter a holding pattern; they had not checked in with Ankara air traffic control but would soon. The flight was 8,000 ft over the Ankara at 13:09 and continued descent to flight level 65. Air traffic control expected to hear from the plane again but never did; the controller made multiple attempts to contact the plane starting at 13:13 but never heard from the plane again. The Viscount, flying at a heading of 283°, collided into the C-47 flying on a heading of 243°, both at 7,000 feet. It was noted that the Viscount attempted to avoid crashing by pulling up but failed. Investigation showed the aircraft collided at a 40° angle. Eyewitnesses to the collision reported that there were clouds where the planes collided. The ICAO laid blame on the Viscount pilot for: incorrectly estimating the distance between Golbasi and Ankara; failing to comply with international standards for radio communications; and failing to follow the flight plan by flying under VFR instead of planned IFR conditions.