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
International standard IEC 61162-420 specifies the requirement for and basic components of the IEC 61162-4 series companion standards. These components are referred to as follows: a) PCS (PISCES companion standards) which contain the rules for the creation of companion standards. The generate principles underlying the PCS are described in clause 4. b) PCSDL (PCS description language). Part of the PCS is the definition of the syntax for the various types of companion standard documents that make them readable by computer tools. The PCSDL is described in clause 5. c) function block description. The function block description is a high level and graphical desc