The MIL-M-18371E Mark 3 Emergency Signalling Mirror has been the visual signalling tool of choice for the US military for decades. This glass mirror is substantially more reflective than its plastic counterparts, and can be used to attract rescuers from distances farther than the naked eye can see. The Mark 3 Signalling Mirror's integral sighting aperture with wire mesh helps aim the reflection, a feature that became standard for all signal mirrors that came after it. Also known as a heliograph, these mirrors are popular for aviation and marine survival kits, and are usually carried in the survival vests of US military aviators. Both types of mirror are approximately 5/8 in. thick. The Type I is smaller and weighs just over 2 oz., while the larger Type II mirror weighs just over 5 oz.
Manufactured from glass for maximum reflectivity, this mil-spec signal mirror is substantially brighter than its plastic counterparts. The Type 1 and Type 2 mirrors can be seen for miles.
This Berry Amendment Compliant heliograph signalling device conforms to US military specification MIL-M-18731E Type I 2 in. x 3 in. (NSN: 6350-01-455-6695) and Type II 3 in. x 5 in. (NSN: 6350-01-455-6671).
Ideal for use by downed pilots, hunters, surveyors, rangers, smoke-jumpers, and any wilderness professional.
Mark 3 Emergency Signalling Mirrors can attract rescuers on ships or aircraft farther away than can be seen by the naked eye, even in hazy conditions.
Their compact size means the MIL-M-18371E Mark 3 Signal Mirrors can be carried in pockets, survival vests, backpacks, and vehicles. The included lanyard even allows the mirror to be carried around the neck