Breitling has reaffirmed its pioneering role in the field of technical watches and instruments for professionals by creating the very first wristwatch with a built-in personal locator beacon (PLB). The Emergency II is a high-tech gem equipped with a dual frequency transmitter compliant with the specifications of the Cospas-Sarsat international satellite alert system and serving both to issue alerts and to guide search and rescue missions.

Developed in conjunction with major scientific institutes, the Emergency II is distinguished by numerous microelectronic and microtechnical innovations, including a revolutionary rechargeable battery, a miniaturized dual frequency transmitter and an unprecedented integrated antenna system – three features specifically developed for this model.

As the first ever wristworn dual frequency PLB, it establishes itself as a safety and survival instrument in all distress situations on land, at sea and in the air.

A Breitling stronghold

In 1995, Breitling struck a decisive blow in launching the first wristwatch with a built-in emergency microtransmitter. Operating on the 121.5 MHz international air distress frequency, the Emergency was designed to enable accurate homing in on pilots or passengers following a plane crash. It was designed for constant wear on the wrist and thus as a complement to the standard onboard aircraft equipment.

The Emergency has been tested and worn in daily use by the finest aviation professionals and the world’s greatest aeronautical teams. It has proven its worth in many search and rescue exercises and has become synonymous with safety and reliability for pilots around the globe. Around 40,000 such watches have been sold, and these exceptional instruments for locating and rescuing people in danger have indeed already saved a number of lives.

Building on this successful and extensive experience, Breitling has achieved a new and unprecedented technical feat in presenting the Emergency II.

The Cospas-Sarsat system

The international Cospas-Sarsat system is based on a network of satellites in lowaltitude earth orbit (LEOSAR) and in geostationary orbit (GEOSAR); it also comprises ground receiving stations as well as control and coordination centers. Its mission is to provide accurate and reliable distress alert and homing data. Supplying this information helps search and rescue (SAR) authorities provide fast and efficient assistance to persons in distress. Since its launch in 1985, the Cospas-Sarsat system has helped save more than 26,000 lives.

The maritime, aviation and land operations comprise three steps: alert, homing and rescue. The alert and homing phases used the same 121.5 MHz analog frequency up until 2009, when Cospas-Sarsat decided that it would phase out satellite processing at 121.5 MHz frequency and that alerts would be triggered only on 406 MHz – a digital frequency able to offer enhanced security, to provide more comprehensive information and to reduce the number of false alarms.

The 121.5 MHz signal is nonetheless still received on land, by ships at sea and by airborne aircraft, and remains the most efficient and reliable system for homing in on victims. Distress radio beacons must thus be of the dual frequency type in order to guarantee accurate homing.

A major innovation

Breitling has once again distinguished itself in the vanguard of electronics by creating the Emergency II, the world’s first wristwatch equipped with a true dual frequency distress beacon. A high-tech miniature marvel, this peerless instrument belonging to the PLB (personal locator beacon) category is distinguished by its transmitter compliant with Cospas-Sarsat specifications and serving both to issue alerts and to guide homing and rescue operations. Representing the culmination of five years of development, the Emergency II called for avant-garde solutions that have contributed to the advancement of microelectronics and microtechnical engineering.

A survival instrument for all distress situations

As the first wrist-type dual frequency PLB (Personal Locator Beacon) and thus worn at all times, the Emergency II is intended for a wide range of users in a variety of fields around the world, including aviation, navigation, climbing, trekking, hiking, exploration, extreme sports, etc.

An innovative dual frequency transmitter

The Emergency II is equipped with a microtransmitter alternately operating on two separate frequencies over a 24-hour period. It transmits a first digital signal on the 406 MHz frequency intended for satellites and lasting 0.44 seconds every 50 seconds; as well as a second analog signal on the 121.5 MHz homing and rescue frequency, lasting 0.75 seconds every 2.25 seconds.

A miniaturization record

The development of this dual frequency transmitter specifically designed for the Emergency II was a major technical challenge, essentially due to its dimensions that had to be adapted to the wrist. Conducted in cooperation with an institute specializing in aerospace, defense and industry, it notably involved creating a new circuit exclusively dedicated to this instrument in order to be able to transmit on two frequencies and to do so within an extremely compact volume. The result is a record in terms of both miniaturization and guaranteed reliability, which lays down new benchmarks reaching well beyond the sphere of watchmaking.

An unprecedented antenna system

The Emergency II is notably distinguished by its ingenious and extremely userfriendly integrated antenna system. Its two extendable antenna “sections” housed in the lower part of the watch, are manually deployed on each side of the case. One of the main challenges consisted in finding a miniaturized device serving to transmit alternately on the two frequencies, with the antenna length varying according to the wavelength. Breitling therefore developed an original system in which, according to circumstances, the transmitter uses either part or the entirety of the two antennae – a major first on a locator beacon.