Signalling mirror
Signalling mirrors are handheld devices designed to signal distress by reflected sunlight. Unlike ordinary mirrors, signalling mirrors have integrated aiming aids that let the user accurately direct the reflected beam of sunlight.
Signalling mirrors are handheld devices designed to signal distress by reflected sunlight. Unlike ordinary mirrors, signalling mirrors have integrated aiming aids that let the user accurately direct the reflected beam of sunlight.
Signalling mirrors are handheld devices designed to signal distress by reflected sunlight. Unlike ordinary mirrors, signalling mirrors have integrated aiming aids that let the user accurately direct the reflected beam of sunlight.
Source: Wikipedia "Signalling mirror" · CC BY-SA 4.0
Share this article: X · Bluesky