Air Traffic Puzzle

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Across
  1. 5. What pilots need for night landing
  2. 6. Opposite of climbing
  3. 8. The phase before final landing
  4. 10. What you'll be after tech school
  5. 12. Aircraft speed measure
  6. 13. Where operations are coordinated
  7. 15. Collision avoiding system
  8. 16. What pilots request before landing
  9. 18. Terminal radar control abbreviation
Down
  1. 1. Parking area for aircraft
  2. 2. Direction given to guide aircraft
  3. 3. Tracks aircraft positions electronically
  4. 4. Phrase controllers give pilots to authorize action
  5. 7. Document filed by pilots before flight
  6. 9. Where planes take off and land
  7. 11. Where ATC works and gives commands
  8. 14. A holding pattern in the sky
  9. 17. The planes you must separate