Setting Sail or Standing By? IMO Launches Two-Year Voluntary MASS Code Countdown

Autonomous shipping has entered a new regulatory phase as the International Maritime Organization (IMO) introduced the first (Non -Mandatory) International Code of Safety for Maritime Autonomous Surface Ships (MASS Code). Effective from 1 July 2026, the Code provides a voluntary international framework that will allow the maritime industry to gain practical experience before mandatory requirements are introduced in the coming years.

Developed under the SOLAS Convention, the goal-based MASS Code establishes internationally agreed safety standards for cargo ships operating with autonomous or remote-control technologies. It addresses key areas such as remote operations, system reliability, cybersecurity, fire safety, and emergency preparedness, while ensuring that autonomous vessels achieve a level of safety and environmental protection equivalent to conventionally crewed ships.

The voluntary implementation period gives flag States, shipowners, classification societies, technology developers, and maritime professionals an opportunity to evaluate operational practices, identify implementation challenges, and contribute practical experience. The lessons learned over the next two years will play an important role in refining the future regulatory framework for autonomous shipping.

The IMO intends to continue developing the mandatory MASS Code through amendments to the SOLAS Convention, with adoption targeted for 1 July 2030 and entry into force on 1 January 2032. Until then, the voluntary Code provides the industry's first globally recognised safety framework for supporting the responsible integration of maritime autonomous surface ships into international shipping.

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