This is the Garmin GNS-430W IFR certified GPS, NAV, and COM. It is showing a track to the Providence airport. Marthas Vineyard is drawn on the bottom of the map display.
The Garmin is coupled to a STEC System 20 Autopilot with a GPS roll steering adapter, also known as GPSS.
A Narco CP-136 audio switching panel is above the Garmin. The Narco MK12D is below.