The Breitling Emergency watch is a handy tool for pilots and aircrews. It has a built-in micro-transmitter that sends out a signal on the 121.5 MHz aircraft emergency frequency in case of emergencies like a crash or forced landing. This signal helps rescuers locate the watch and provide assistance. The transmitter can be activated by unscrewing the protective cap and pulling out the antenna, and it will continue to broadcast for 48 hours. In ideal conditions, the signal can reach up to 160 kilometers (100 miles) if the search aircraft is flying at 6,000 meters (about 20,000 feet). Ref. E7632110/B576.