A signal mirror is a key tool for any survival kit. When used correctly, it can reflect sunlight with life-saving accuracy as far as 7 miles on a clear day.
How to use a Signal Mirror
How would you survive on a desert island? - Quora
PE 3 Lesson 3 Backpacking, PDF, Hiking
Ways to Signal for Help in the Wilderness
Using a Survival Signal Mirror for self-rescue - Elite Outdoor Fitness
DIY Science & Technology, Page 30 of 55
The Signal Mirror: A Low-Tech Lifesaver
Stampede Trail Hiking Guide: Life & Death at Into The Wild's Magic Bus
PE 3 Lesson 3 Backpacking, PDF, Hiking
Survival Signal Device: How to use a Signal Mirror
Survival How To: Using a Mirror to Signal For Help