DIN ETS 300441-1996 无线电设备和系统(RES).海洋遇险用呼叫频率2182kHz的无线电话监视接收器的技术特性和测量方法
Radio Equipment and Systems (RES) - Technical characteristics and methods of measurement for maritime radiotelephone watch receivers for the distress and calling frequency 2182 kHz; English version ETS 300441:1996
The document states the minimum requirements for a maritime radiotelephone watch receiver, including power supply units or converters, intended for keeping watch on the international distress and calling frequency 2182 kHz.