Nice find, esp. the signal mirror. i do have a question, though. Why the compass for a lost hiker? while I have never been lost, although to quote Daniel Boone, I have been "mightily confused" at times. I have never been so messed up that I wasn't aware of the cardinal directions. What is really essential is a decent map, typically a USGS topo or derivative.

I chuckle at the advice to float the compass needle on water. In the circumstances I have found myself in (desert rat here) it would be more likely advantageous to drink the water and eyeball the shadows for directions.

Things do change drastically when at sea, in dense fog, or similar, and I do routinely carry a compass- a good dependable one.
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Geezer in Chief