From the story: Despite having a hand-held Personal Locator Beacon (PLB), it was Spencer's Breitling Emergency watch and its built-in homing signal that saved the day. "Breitling is the number one piece of equipment I always bring with me," said Spencer, who works in the renewable energy industry. "Even if I lose everything, I will always have my watch. That gives me and my family peace of mind." The timepiece is designed with a micro-transmitter broadcasting on the 121.5 MHz aircraft emergency frequency. The transmitter is activated by unscrewing a protective cap and extending a short antenna. The signal can be heard for about 100 miles and will broadcast for 48 hours.