Fun Fact

Fun Fact:

jheath:

What with this streak of transponder related questions, here’s an interesting story I learned in Oklahoma City.

The transponder got it’s start in WWII as a means by which to discern friendly Allied aircraft from the Axis opposition. The first version was called the Position Adjustable Range…

Well, it finally makes sense!

via Tumblr http://thenelsontwins.tumblr.com/post/69750550879