Mirage IIIS / IIIRS Avionics

[yahya]

Can someone identify the nomenclature and maker of the navigation system on the early Swiss Mirage IIIR as shown on the image below please? I am particularly interested in the round analog map display in the lower center console and the navigation panel on the right hand console. Was it a Doppler radar-based system?

https://www.airliners.net/photo/Switzerland-Air-Force/Dassault-FW-Emmen-Mirage-IIIS/876193/L

 

[yahya]

In the meantime I learned that the round moving map (tactical display) from the Swiss Mirage III was made, as was the Taran-18 radar, by Hughes.

Does anyone know how the moving map display was fed with navigation data? What was the main nav system of the Swiss Mirage IIIS? Did the nav data come from an INS?

 

[Kiltonge]

A couple of 1960 Hughes TARAN ads might shed some light. Reportedly was selected by the Swiss due to its capability over rugged terrain.

The Rapiere system tested in the N-156F also used the TARAN, but required a Litton INS to drive the moving map display. It's not clear whether this was succeeded by the Hughes "Automatic Navigation and Display System" mentioned in the ad.

TARAN was originally based on the MG-13 FCS from the F-101 but with a lot of components 'solid-stated' and eventually lost most of its commonality with that system.

 

[yahya]

Thank you for the answer. I am still trying to figure out how the moving map worked and what was the source of bearing. There is a YT video of the Mirage IIIS simulator at work, which shows the backlit moving map display and its rotation. Could the gyro platform be the source of bearing thus rotation?