The bright light spot on the signal mirror is used to do what?

The primary function of the bright light spot on a signal mirror is to signal distress. When using a signal mirror, the bright reflection of sunlight can be aimed to catch the attention of rescuers or passing vessels. This is an effective survival signal because it can be seen from long distances, especially during daylight conditions. The mirror operates as a signaling device, allowing the user to direct a beam of light towards a specific target—such as a search and rescue team—indicating the need for assistance.

While other functions such as locating the mirror, reflecting sunlight, or identifying targets may tangentially relate to the use of a signal mirror, they do not capture its primary purpose in emergency situations. The act of sending out a visual distress signal is crucial, as it can be a lifesaving measure for individuals in need of help.