The IMO MASS Code 2026: What the New Autonomous Shipping Framework Means
In May 2026, the IMO adopted a new non-mandatory International Code of Safety for Maritime Autonomous Surface Ships (MASS Code). The Code took effect on 1
In May 2026, the IMO adopted a new non-mandatory International Code of Safety for Maritime Autonomous Surface Ships (MASS Code). The Code took effect on 1 July 2026 and provides a goal-based framework for the safe integration of remotely controlled and autonomous commercial ships.
What is a MASS?
IMO describes a Maritime Autonomous Surface Ship as a ship that can operate independently of human interaction to varying degrees. The regulatory approach considers the functions performed by people on board, remotely, or by autonomous systems.
Why this matters beyond technology
Autonomy changes questions about roles, responsibilities, remote operations, safety management, certification and competence. It is therefore a people-and-governance issue as much as a technology issue.
What organizations should watch
- How operational modes are defined and documented.
- Competence and responsibilities of remote operators and onboard personnel.
- Integration with the Safety Management System.
- Cyber risk and connectivity controls.
- Experience-building work that will inform future mandatory requirements.
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