DIN EN 61023-2008 海上导航和无线电通信设备及系统.航海速度和距离的测量设备(SDME).性能要求、测试方法和要求的试验结果
Maritime navigation and radiocommunication equipment and systems - Marine speed and distance measuring equipment (SDME) - Performance requirements, methods of testing and required test results (IEC 61023:2007); German version EN 61023:2007