DIN EN 302961-1-2013 电磁兼容性和无线电频谱事项(ERM).只作搜寻和救援用途频率为121.5 MHz用海上个人归航信标.第1部分:技术特点和测量方法(英文版本EN 302961-1 V1.2.1(2013-07)的核准本作为德国标准)
Electromagnetic compatibility and Radio spectrum Matters (ERM) - Maritime Personal Homing Beacon intended for use on the frequency 121,5 MHz for search and rescue purposes only - Part 1: Technical characteristics and methods of measurement (Endorsement of