IACS UR E27

IACS Unified Requirement E27, Cyber resilience of onboard systems and equipment, sets cyber-security requirements for the individual computer-based systems delivered to a ship: secure development, capability profiles, hardening, network and access control, and verification of each system or component. It applies to ships contracted for construction on or after 1 July 2024 and complements UR E26, which addresses the ship as a whole. The technical requirements draw on the IEC 62443 industrial-automation security series.