Garmins latest software for the GTN navigators (V6.5) offers compelling new features. GTNs come in both the GTN 700 and GTN 600 series. The patriarch is the x50 (650 or 750) with GPS/NAV/COM capabilities; whereas the x25 has only GPS. The 600 and 700 differ in the screen size and the 700s ability to control an embedded audio panel. With the larger screen, the 700 can also display georeferenced (Jeppesen or AIS) approach charts.