IEC 61162-420-2001
海上导航和无线电通信设备及系统 数字接口 第420部分:多通话器和多受话器 船舶系统互连 围罩梯口标准要求和基本围罩梯口标准
Maritime navigation and radiocommunication equipment and systems - Digital interfaces - Part 420: Multiple talkers and multiple listeners; Ship systems interconnection; Companion standard requirements and basic companion standards