[kageneko]

Yeah. I was working on some search-and-rescue stuff using Google Glass. My eventual prototype had a "coarse" mode and a "fine" mode.

In fine mode, it would give you a fairly detailed readout of the bearing and distance to your target (marked with GPS). It required doing that thing where you're looking up-and-to-the-right in order to see what was going on.

In coarse mode, the entire Glass display was changed to a single color. I found that it showed up well even in someone's peripheral vision and the colors were distinct enough that you could navigate pretty well without having to watch the display.

I tried using symbols (giant triangles to indicate direction and such) but none of them worked as well as the color blocks.