Oh, hey, it is the Star Fontiers Referee Screen (1983)!

Not much to say about the screen other than it has charts and does indeed prevent players from seeing what you are doing. I mostly wanted to post it to show off Jeff Easley’s take on Mos Eisley. I like it a lot.
There is a mini-module included that is basically a reusable framework for repelling hostile boarders aboard a starship. It is handy and was one of the only insights into spaceship based combat available for Star Frontiers until the release of Knight Hawks. Weird, I know.

