11. However, centre services are normally amalgamated with approach control . 12. At 23 : 10, Columbus Approach Control was contacted. 13. Controllers hand off direction of aircraft to controllers in adjacent centers, or to approach control centers. 14. A new control tower, new approach control facility, and a new fire station were opened in 1999. 15. The Terminal Radar Approach Control , which handles planes a little farther from the airport, was also closed. 16. Dive brakes are used for approach control . 17. In 1995 Biggin Hill radar approach control ) moved in from its former home at Heathrow Tower. 18. Below 10, 000 feet and within 50 miles of airports, planes are controlled from Terminal Radar Approach Controls . 19. Then contact was lost again until 4 : 50, when he was picked up by Bermuda Approach Control . 20. After three unsuccessful attempts to contact the aircraft, the Tower advised the Approach Control to call Flight 53.
