I found only https://www.ricomputermuseum.org/collections-gallery/equipme... no screenshots in sight

I found http://heaveneverywhere.com/Navigator/

Stephen Pope and David Leibs were (and hopefully still are) excellent people.

thats really cool!

too bad the linked video is nowhere to be found....

The video is here: A Navigator for Unix -- https://www.youtube.com/watch?v=I3oqgJ1r90c

unfortunately due to the video quality it's very hard to see the details. I doubt the original analog quality was that bad, it either got crippled by digitalization or it had degraded before being digitalized.

nice!