IEC 61162-450:2018

Overview

IEC 61162-450:2018 - "Maritime navigation and radiocommunication equipment and systems - Digital interfaces - Part 450: Multiple talkers and multiple listeners - Ethernet interconnection" - defines interface requirements and test methods for high‑speed shipboard communication over Ethernet. The standard provides a framework for implementing multicast and point‑to‑point data transfer between navigation and radiocommunication devices and other ship systems, ensuring interoperable shipboard Ethernet communications for IEC 61162‑1 sentences, IEC 61162‑3 PGN messages and general binary file transfers.

Key topics and technical requirements

• Ethernet‑based multiple talkers / multiple listeners model (single Ethernet network limited to OSI layer 1 and 2 devices).
• Multicast distribution of IEC 61162‑1 sentence formats (e.g., position fixes) and IEC 61162‑3 PGN messages; support for binary file (image) transfers such as radar → VDR.
• Transport options: UDP multicast for broadcast-style distribution; TCP/IP point‑to‑point file transfer alternative (based on Annex H of IEC 62388 for radars).
• Network traffic management: IGMP snooping based filtering to limit received traffic per device; network traffic balancing to avoid congestion.
• PGN encapsulation: New encapsulation rules for IEC 61162‑3 PGNs (Edition 2).
• Interface‑only scope: Requirements apply to equipment interfaces (guarantee of interoperability and predictable, safe behavior); system-level requirements are outside this document and addressed in IEC 61162‑460.
• Testing and conformance: Methods of test and required results are specified for equipment functions (NF, SF, SNGF, PNGF, ONF), transport and application layers, binary image transfer, error logging and maximum data rates.
• Cybersecurity support: General authentication tag ("a:") added to help manage cyber risk.

Practical applications and who uses it

• Shipboard network design and implementation for commercial and naval vessels.
• Marine electronics manufacturers (radar, GNSS, AIS, ECDIS, VDR) implementing interoperable Ethernet interfaces.
• System integrators and shipyards installing multi‑vendor navigation/radio networks.
• Test laboratories and classification societies verifying interface conformance and safety behavior.
• Onboard network administrators and maritime IT teams ensuring traffic filtering, multicast performance and reliable binary file exchanges.

Related standards

• IEC 61162‑1 - Serial data for shipboard navigation (sentence formats)
• IEC 61162‑3 - Controller Area Network (CAN bus) / PGN messages
• IEC 61162‑460 - System requirements for multiple talkers/multiple listeners
• IEC 62388 (Annex H) - Radar TCP/IP file transfer guidance

By conforming to IEC 61162‑450, maritime equipment vendors and integrators can achieve robust, interoperable shipboard Ethernet communication with controlled multicast traffic, standardized PGN handling and tested binary file transfer mechanisms - supporting safer and more maintainable navigation systems.