RECCO is an avalanche rescue system. Recco, which basically means reconnaissance, is a system developed in 1983 in Sweden as a response to an avalanche accident that involved the founder of the system. At present, the system is used by many ski resort and mountain rescue teams.
The Recco rescue system is a two-way part technology, of which rescuers have detectors that search out for signals produced by reflectors. Recco reflectors are worn by patrons of the ski resorts, skiers, riders and other outdoor people. The reflectors bounce back a directional signal that directs a rescuer straight to the reflector thus; this lets the rescuer know exactly where the buried victim is.