ITU-R M.690-3-2015 Technical characteristics of emergency position-indicating radio beacons operating on the carrier frequencies of 121.5 MHz and 243 MHz
This Recommendation contains technical characteristics to which emergency position-indicating radiobeacons (EPIRBs) intended to operate on the carrier frequency of 121.5 MHz and 243 MHz should conform.Additional characteristics for EPIRBs intended for carriage on aircraft are specified in relevant annexes tothe Convention on International Civil Aviation.
ITU-R M.690-3-2015 history
2015ITU-R M.690-3-2015 Technical characteristics of emergency position-indicating radio beacons operating on the carrier frequencies of 121.5 MHz and 243 MHz