AV-30-C is not approved for primary IFR GPS navigation.  The AV-30-C is approved for installation as a primary Attitude Indicator or primary Directional Indicator.  The AV-30 is capable of receiving serial GPS streams.  When connected to an external GPS navigator or hand-held, AV-30 operates as a repeater display. The data provided includes current waypoint ID, distance to destination, ground speed, cross-track error, desired track, and bearing to waypoint.