Signal Mirror

The purpose of the hole is to cancel out the flaw in the traditional mirror while signaling.
Signal mirror. The Military Glass Signal Mirror MIL-M-18371E NSN 6350 00 261 9772 is one of the best day emergency signaling devices available. The technique for using the signal mirror is pretty straightforward. While an ordinary reflective mirror can also be used as a signaling device it cannot be precisely aimed and flashed at a target like a purpose-built signaling mirror.
It is effective even on overcast days and a classic must-have for any survival kit. Hold mirror close to the eye and slowly turn and manipulate it so that the bright light spot is on the target. Long range reflectivity with aiming screen.
You will see a bright spot. 44 out of 5 stars. A real signal mirror is a mirror with a built-in way to precisely aim its reflection from the sun and is intended to alert others of your location.
Use the mirror to reflect sunlight on to a nearby surface like a raft or your hand. The technique for using a signal mirror is simple. Tilt the mirror up toward the sun until you see a small bead of light.
Howard in the USA is a military approved and issued emergency signal mirror. Simply put this is the easiest way to use a signal mirror that I know of. Some partners do not ask for your consent to process your data instead they rely on their legitimate business interest.
Explore signal mirrors 629 photos on Flickr. The signal mirrors in the life rafts of most US ocean-going vessels use double-sided aimers and such mirrors been used very successfully for Operation On-Target for decades.