GPI Mk7
I'll put this here, and hope.
During NAV / OBS training in the RAAF HS748s, we used to use the Ground Position Indicator Mk7 (GPI Mk7). Going down memory lane, I wanted to collect some information on it but so far have come up empty handed.
The best I have found is a reference that it may have also been used on RAF Valiants.
Does anyone know of any web-based sources for pictures and / or technical data on the GPI Mk7?