| 21. | The air traffic controller called over and over for a response.
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| 22. | It notifies air traffic controllers visually and audibly of potential problems.
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| 23. | Just stay quiet . " Air traffic controllers hear the transmission.
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| 24. | The pilots talk to air traffic controllers about reducing their speed.
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| 25. | They also can operate as Air Traffic Controllers ( ATC ).
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| 26. | His scanner crackles with messages from pilots to air traffic controllers.
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| 27. | Civil aviation officials were contemplating action against some air traffic controllers.
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| 28. | He noted that most delays are mandated by air traffic controllers.
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| 29. | Then air traffic controllers went on strike and closed the skies.
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| 30. | National Air Traffic Controllers Association : www . natca . org
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