User:The Catbird

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An Lockheed Martin F-35 Lightning II.
An Lockheed Martin F-35 Lightning II.

The Lockheed Martin CATBird is a highly modified Boeing 737-330 designed to provide an economic alternative for developing and flight testing the Avionics suite for the Lockheed Martin F-35 Lightning II. The name is an adaptive acronym, from Cooperative Avionics Test Bed. Coincidentally, CATBIRD is Lockheed Martin Aeronautics's ICAO-designated company callsign.