N878AC was born before the age of the fancy GPSs. It did have an older Garmin GPS and for people used to the SFRA and the Leesburg maneuvering area, that was fine. However, if you are less familiar with the area, maybe you want to make 100% sure that you do not wander into an area where you are not supposed to be (even that this might present the chance of flying in formation with an F-16). Also, the radio portion of the old GPS was a bit unreliable.

For these reasons and to make things easier for everybody, we have had a Garmin GNS430 installed in the airplane. You can find a quick reference guide in the resources area of this web site (http://www.flythedecathlon.com/garmin-430-quick-reference-guide/). And, the AOPA Safety Institute has a short interactive (free) training module here: http://www.aopa.org/asf/online_courses/gps/.

Enjoy..!