Collins (Booth 8448) Pro Line 21 Continuum avionics are in eight aircraft retrofit programs. Installations underway include the Challenger 601, Falcon 50 and Citation III. The fully integrated systems for the Challenger 601 and Falcon 50 feature four 10 x 8-inch LCD adaptive flight displays, FMS-6000 flight management system, AHS-3000 attitude heading reference system, TCAS-4000 traffic alert and collision avoidance system, TWR-850 turbulence-detection weather radar and Pro Line radio sensors.