When will the IMO MASS Code become mandatory?

The IMO adopted the non-mandatory MASS Code in 2024. Mandatory implementation through amendments to SOLAS and other conventions is targeted for 2028, subject to the standard IMO adoption and entry-into-force timeline.

How is COLREGS compliance demonstrated for autonomous navigation AI?

Flag states and classification societies require extensive simulation testing across thousands of encounter scenarios, followed by supervised sea trials. The AI must demonstrate COLREGS-compliant behavior including subjective rules like good seamanship, typically validated through comparison with expert mariner decisions.

Which classification societies offer autonomous ship notations?

DNV, Lloyd's Register, Bureau Veritas, ClassNK, and the American Bureau of Shipping all offer autonomous or smart ship notations. Each has its own rule set, but all require a structured safety case, AI validation methodology, and cybersecurity assessment.

What cybersecurity standards apply to maritime AI?

IMO Resolution MSC.428(98) requires cyber risk management within the ISM Code safety management system. IACS Unified Requirements E26 and E27, mandatory for new builds from July 2024, provide specific cybersecurity engineering requirements covering AI and autonomous systems.

Does the EU AI Act apply to autonomous ships in EU waters?

The EU AI Act applies to AI systems placed on the EU market or used in the EU. AI navigation and safety systems on ships operating in EU waters or flagged in EU member states are within scope. However, the AI Act defers to sector-specific conformity assessment where available, meaning maritime certification procedures under classification society rules may satisfy AI Act requirements.

Quick answer

Maritime AI must comply with the IMO Maritime Autonomous Surface Ships (MASS) Code (adopted 2024, entry into force expected 2028), classification society rules for autonomous ship notation, the ISM Code for safety management, and national maritime authority requirements for testing and deployment of autonomous vessels.

Updated June 2026 · MmowW AI Compliance

AI Compliance in Maritime: Autonomous Ships, Port AI, and IMO Regulations

Maritime AI Regulatory Framework

The International Maritime Organization (IMO) adopted the MASS Code in 2024, providing the first international regulatory framework for autonomous ships. The non-mandatory code is expected to become mandatory through amendments to SOLAS (Safety of Life at Sea) and other IMO conventions, with entry into force targeted for 2028. The code applies to vessels with varying degrees of autonomy, from decision support systems to fully autonomous operation.

The MASS Code uses a goal-based approach: autonomous systems must achieve at least the same level of safety as conventional ships. This performance standard applies to navigation AI, collision avoidance, situational awareness, and emergency response systems.

Autonomy Levels and Requirements

IMO Autonomy Degree	Description	Key Regulatory Requirements
Degree 1	Ship with automated processes and decision support	Seafarer competency requirements, system reliability standards
Degree 2	Remotely controlled ship with seafarers on board	Remote control center standards, communication redundancy, fallback to manual
Degree 3	Remotely controlled ship without seafarers on board	Shore control center certification, cyber resilience, remote survey capability
Degree 4	Fully autonomous ship	AI validation and verification, safety case approval, continuous monitoring, emergency protocols

Classification Society Rules

Classification societies (DNV, Lloyd's Register, Bureau Veritas, ClassNK) have developed autonomous ship notations that supplement the IMO framework. DNV's rules for autonomous and remotely operated ships (DNV-RU-SHIP Pt.6 Ch.9) specify requirements for AI-based navigation, machine perception systems, decision-making algorithms, and remote control infrastructure.

Lloyd's Register's ShipRight procedures for autonomous ships require a structured safety case for each AI function, including hazard identification (HAZID), failure mode and effects analysis (FMEA) of AI components, and simulation-based validation of AI performance across the operational design domain.

Navigation AI and COLREGS

AI navigation systems must comply with the International Regulations for Preventing Collisions at Sea (COLREGS). This is technically challenging because COLREGS rules contain subjective terms like good seamanship (Rule 2) and safe speed (Rule 6) that require contextual judgment. The MASS Code addresses this by requiring autonomous navigation AI to demonstrate COLREGS-compliant behavior validated through extensive simulation and sea trials.

Flag states conducting MASS trials (Norway, Finland, United Kingdom, Singapore, Japan, South Korea) have issued interim guidelines specifying testing requirements, safety zones, and crew competency standards for supervised autonomous operation.

Port AI and Terminal Automation

AI in port operations (automated container terminals, vessel traffic services, port community systems) falls under national port authority regulations and the Port State Control framework. The IMO FAL Convention (Convention on Facilitation of International Maritime Traffic) governs data exchange in ports and is being updated to address AI-processed data.

Automated container terminals using AI for crane operation, stacking optimization, and automated guided vehicles must comply with the EU Machinery Regulation 2023/1230 and national occupational safety regulations. The European Maritime Safety Agency (EMSA) provides guidance on AI integration in vessel traffic services.

Cybersecurity for Vessel AI

IMO Resolution MSC.428(98) requires cyber risk management as part of the ISM Code safety management system. For AI-equipped vessels, this means protecting AI models and training data against tampering, securing communication links between vessel AI and shore-based systems, monitoring for adversarial inputs to perception systems (GPS spoofing, AIS manipulation), and maintaining cybersecurity throughout the AI system lifecycle.

The IACS (International Association of Classification Societies) Unified Requirements E26 and E27 on cyber resilience, mandatory for new builds from July 2024, explicitly cover AI and autonomous system security.

Environmental Monitoring AI

AI systems monitoring emissions compliance (MARPOL Annex VI, EU MRV Regulation, IMO DCS) must maintain auditable records. The EU Emissions Trading System extension to maritime (from January 2024) requires verified emissions data. AI systems calculating and reporting emissions must meet verification standards under Regulation (EU) 2023/957. Autonomous ship operators using AI for voyage optimization to reduce emissions must demonstrate that fuel savings claims are based on verified data.

Compliance Pathway for Maritime AI

Engage the relevant classification society early for AI notation and safety case development
Demonstrate COLREGS compliance through simulation and supervised sea trials under flag state authorization
Implement cybersecurity management for vessel AI per IMO MSC.428(98) and IACS UR E26/E27
Ensure port AI systems comply with the Machinery Regulation and national occupational safety requirements
Maintain verified emissions monitoring data when AI systems are used for environmental compliance
Prepare for MASS Code mandatory implementation expected by 2028

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This article is for informational purposes only and does not constitute legal advice. Regulatory requirements change frequently — verify current rules with official sources. Built by Sawai Gyoseishoshi Office, Hiroshima, Japan.