Differences between the GNS 400 or GNS 500 series and the WAAS GNS 400w and GNS 500w series

The WAAS systems have the same capabilities as the GNS™ 400 and GNS™ 500 avionics plus a few more. With the WAAS signal being acquired, the GPS can give vertical guidance to a runway similar to an ILS glide slope indication. The WAAS units have added display capability when connected to our GDL 69(A) XM Satellite weather/radio receiver. They also have additional ARINC 424 leg types to guide a compatible autopilot through procedure turns and published holds.