The WAAS systems have the same capabilities as the 400/500 systems 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.