The purpose of this document is to define the minimum requirements to be used for the development and manufacture of 406 MHz Emergency Locator Transmitters (ELTs), Emergency Position-Indicating Radio Beacons (EPIRBs), and Personal Locator Beacons (PLBs). In this document, the term ELT indicates an aviation distress beacon, an EPIRB a maritime distress beacon, and a PLB a distress beacon for personal use. Specifications that are critical to the Cospas-Sarsat System are defined in detail; specifications which could be developed by the national authorities are identified in more general terms
