Skip to content

Cyber Secure class notation

Address risk of cyber security incidents and demonstrate cyber security capabilities and IMO and IACS UR E26 compliance with DNV Cyber secure class notation.

Due to the increasing focus both from regulators and potential attackers, as well as complexity of vessels’ digital systems, along with new safety risks for the system, crew and passengers, it is essential to establish sufficient and efficient cyber security barriers. Increased focus is driven by:

  • New technology, more automation and digitalization
  • An increase in cyber incidents is affecting shipping and offshore
  • Regulations and laws are being introduced
  • Inclusion of cyber security in charterer’s vetting evaluations

Our Cyber secure class notation

The Cyber secure class notation from DNV has been developed to address the cyber security of a vessel’s main functions and the owner’s operational needs. It establishes recognised requirements for vessels and offshore units in operation and newbuilds across different segments and security levels.

The Cyber secure class notation comprises three different qualifiers:

  • Cyber Secure entry-level class notation addresses the most critical vulnerabilities. In addition, the notation requires that a cyber security management system is established to ensure secure ship operation and meet the upcoming IMO resolution MSC.428(98).
  • Cyber secure (Essential) includes all of the entry-level notation above, but in addition examines the control systems in more detail to ensure security controls/capabilities at security profile 1 (profile of IEC 62443 security level 1). It is primarily intended for more complex ships in operation, whereby cyber security is implemented into existing procedures and systems, aiming to establish an adequate security level. This level will be mandatory for vessels contracted for construction after 1st of January 2024 by the IACS UR E26.
  • Cyber Secure (Advanced) covers the same scope as the Essential scope, however with increased security level (security profile 3). This is primarily intended for more complex newbuilding projects and is designed to protect against intentional violations using sophisticated means and specific control system skills.

The notations cover 10 essential functions, including propulsion, steering, navigation, power generation, watertight integrity and others.

  • The (+) plus notation allows the owner to include additional systems. It addresses threats as well as assesses and secures additional systems which are particularly important for operations and not part of the standard scope of essential and important functions such as cargo systems, entertainment systems, IT systems and drilling systems.

All qualifiers describe the process for implementing cyber security onboard the vessel, for asset owners and operators, system integrators (e.g. yards) and equipment manufacturers. The notation’s security levels are based on the international technical standard IEC and have been adapted for the maritime industry.

Evidence of compliance towards the Cyber secure class notation can also be provided as a verification service for non-DNV classed vessels.

Your benefits

With DNV’s Cyber secure class notation, you can stay safe and compliant, and get ahead in the digital transformation of the maritime industry:

  • Less risk of cyber security threats and reduced downtime due to cyber attacks
  • Proof of cyber security resilience for your vessel and ensure compliance with the IMO cyber risk resolution as well as IACS unified requirements E26
  • Increased charter probability due to better vetting score from charterers and oil majors
  • Regular audits to verify continuous compliance and focus on upcoming cyber security threats
  • Increased cyber security awareness of both crew and shore personnel

Related Downloads

  Cyber Secure class notation

Cyber Secure class notation

Download the 2-page flyer

  Cyber secure notation level selector app

Cyber secure notation level selector app


SMS Cyber Security Quick Check

Test where you stand in regard to the IMO requirements on cyber security


DNV Cyber secure rules -DNV-RU-SHIP Part 6 Chapter 5 Section 21


DNV Maritime Cyber security


DNV Cyber secure guideline CG-0325

Download your copy


DNV Cyber security type approval


Cyber security advisory services


On-demand webinar: Cyber security in the maritime industry – the ISM Code as another driver (March, 2020)


On-demand webinar: Cyber security in ship newbuildings for yards and suppliers (June, 2019)