U. s. and european pilots are now trained to follow traffic collision avoidance system (tcas) instructions even if they conflict with instructions from an air traffic controller.
a) true
b) false

A) True    

Explanation:

           A traffic collision avoidance system is a traffic alert for the aircraft in the middle of the air. It is a collision avoidance system that is designed and developed to reduce the  occurrence of collisions between the aircraft in the middle of air.

          The Federal Aviation Administration of the United State and the European Union Aviation Safety Agency of Europe made it mandatory for certain aircraft to install them. The pilots are trained to follow the instruction of the Traffic Collision Avoidance System.

Hence the answer is TRUE.

john social contacted the noble of religous

answer; cognitive neuroscientist;