IEC 61162-2:2024 CMV includes both the official standard and its commented version. The commented version allows for a quick and straightforward comparison of all changes made between IEC 61162-2:2024 edition 2.0 and the previous IEC 61162-1:1998 edition 1.0. Additionally, comments from experts in IEC TC 80 are included to explain the rationale behind the most significant changes and to clarify any aspects of the content.

IEC 61162-2:2024 outlines the requirements for data communication among maritime electronic instruments, navigation, and radiocommunication equipment when connected via an appropriate interface. The document is designed to facilitate one-way serial data transmission from a single talker to one or more listeners. The data is presented in printable ASCII format and can encompass any information as defined by approved sentences or encoded according to the rules for proprietary sentences. Typical messages range from 11 to a maximum of 79 characters in length and typically require repetition rates of up to once every 20 milliseconds. The electrical definitions in this document are intended to support higher data rates than those specified in IEC 61162-1. Given that there is no guarantee for message delivery and only limited error-checking capabilities, it is crucial to exercise caution when using this document in safety-related applications.