Autopilot Control Panel for A-5 Auto Pilot System, Sperry Carvair Here is an article from

Here is an article from Flight Magazine Sept 1943 describing the Astrograph

as illustrated in the Airborne Radio Equipment Handbook dated 1943 (see illustrations)

as used in US Navy aircraft during WWII

appear to use a next generation autopilot and not the GR-2

25 inches diameter and ~3

Autopilot Control Panel for A-5 Auto Pilot System, Sperry Carvair Here is an article fromThe A 5 Automatic Pilot was used primarily in WWII era bomber aircraft of the Air Corps US Army such as the Consolidated B 24 Liberator (see photo of B 24 cockpit showing the location of the A 5 panel). The A 5 system appeared in aircraft manufactured during or before 1943, the year when the Honeywell C 1 system became the standard autopilot system for large multi engine aircraft. Theoretically, the A 5 system may also have appeared in the Boeing B 17