Make it an implant, and have it brings up a window with a pixel map of your surroundings, a bit bigger than the size of your screen. Doesn't show any detail, only shows walls (or anything that cannot be walked through), airlocks, floors, people, and their line of sight.
Like this:
The player is standing in the bridge, and someone is in EVA storage or whatever it's called. The blue field is their line of sight.
