Why Airplanes Still Use Dead Reckoning

Dead reckoning is one of the most basic forms of navigation; you simply move in a known direction and record how far you travel going in that direction.  Using your old location, you can now compute your new location.  You might be surprised to find out that some of the newest most technologically advanced aircraft still use this form of navigation.  Join us to find out why this ancient form of navigation is still used today in the presence of much more advanced forms of navigation such as GPS.