A transponder is a transmitter that sends out high-frequency radio signals that can be picked up by radar and by on-board collision avoidance systems. The signals tell air traffic controllers and ...

You keep hearing experts talking about the missing Malaysia Airlines Flight 370 and the fact that its transponder went from on to off. What are aviation transponders? Here’s a quick primer: Q. What ...

As the search continues for the missing Malaysia Airlines flight, a key unanswered question is what happened to the Boeing 777’s transponder. Transponders emit electronic signals containing ...

Diagram explains a transponder; 2c x 4 inches; 96.3 mm x 101 mm; As the search continues for the missing Malaysia Airlines flight, a key unanswered question is what happened to the Boeing 777's ...