This document supersedes the ED-62A “Minimum Operational Performance Specification for Aircraft Emergency Locator Transmitters 406 MHz and 121.5 MHz (Optional 243 MHz)” dated February 2009. As compared with the previous document, the main changes are: a.Introduce next generation ELTs specifications, b.Specifications for GNSS position information that is used in ELTs, c.Power source specifications, d.Crash safety specifications, e.Second generation homing specifications f.Improved Antenna and Cabling Specifications, g.In-flight distress tracking ELT(DT) specifications.