Flag down rescuers
Flash your light in groups of three to indicate distress. If you’re in a wooded area, tie the headlamp to the end of a long stick to reach over vegetation. Wave it to create a visible arc. Out of battery? Tap lightly around the side of the lamp with a sharp rock to separate the silver cup behind the bulb. Use the cup to reflect sunlight.
If your batteries die or you can’t ignore your hunger, repurpose reflective elements to attract fish. Work loose the silver LED backing by pressing the edge of the disc with a sharp rock. Then smash…