In this episode, the Roswell Flight Test Crew tests the “Big 5” GPS tracker, now available from Hobbico. Powered by an internal battery, the unit can be attached to a drone or other model aircraft and record GPS-based performance data at intervals as short as one second. This includes speed, altitude and location, and can be downloaded onto a computer via an included USB cable and plotted on a map or satellite image to show its movement. To test the accuracy and effectiveness of the Big 5, the crew tests two of the units against each other as well as comparing its results with a radar gun.