CS-READY indicates that vessels being outfitted with cyber-enabled systems are constructed and documented in accordance with the ABS Guide for Cybersecurity Implementation for the Marine and Offshore Industries in order to support more rapid completion of CS-1 requirements following delivery to the owner.
CS-SYSTEM indicates that the Original Equipment Manufacturer (OEM) has developed, embedded, and described cybersecurity capabilities in the critical system submitted for notation and communicated unresolved potential cybersecurity vulnerabilities to the shipbuilder and owner.
CS-1 indicates that cybersecurity risks have been identified onboard, and the necessary steps have been taken to implement the requirements within cybersecurity activities that address those risks.
CS-2 indicates the extension of CS-1 cybersecurity activities with additional policies and procedures concerning cybersecurity system management and technical evolution – typically, this is needed for large fleets of vessels.