The International Maritime Organization ( IMO) has officially adopted its first global safety code governing autonomous commercial vessels, establishing an international regulatory baseline for ships operating via artificial intelligence and remote shore centers.
The International Code of Safety for Maritime Autonomous Surface Ships, known as the MASS Code, was finalized Friday at the conclusion of the 111th session of the IMO’s Maritime Safety Committee held in London. The newly minted framework aims to safely integrate remote-controlled and crewless cargo ships into international shipping lanes while ensuring they maintain structural, environmental, and security standards identical to conventional crewed vessels.
The voluntary code applies strictly to cargo ships regulated under the International Convention for the Safety of Life at Sea and is slated to take effect on July 1, 2026. Maritime officials said the non-mandatory phase will allow member states to test and refine the rules before they are formally institutionalized as binding global law.
"This landmark achievement positions IMO at the forefront of regulating emerging technologies, demonstrating the organization’s ability to anticipate and shape the future of shipping," said IMO Secretary-General Arsenio Dominguez following the standard committee vote.
Dominguez emphasized that while the code accelerates technological innovation, accountability and human oversight remain fundamental tenets of the new framework.
Under the code's strict provisions, an operational vessel is classified as autonomous if its shipboard software is verified to safely execute navigational commands without onboard human intervention. Though fully uncrewed ocean crossings remain limited, successful localized trials have multiplied worldwide, prompting regulators to address legal gaps in standard navigation, cybersecurity, connectivity, and open-ocean search and rescue operations.
Crucially, the MASS Code mandates that a designated captain or master retains absolute legal responsibility for the vessel at all times, regardless of whether that captain is physically stationed on the bridge or monitoring the ship from a land-based Remote Operations Centre.
The code’s structural roadmap anticipates an incremental transition toward mandatory global enforcement. The Maritime Safety Committee plans to re-establish its specialized working group in December 2026 to launch an Experience-Building Phase using data gathered from initial voluntary rollouts. Formal drafting of a legally binding mandatory code is projected for 2028, with full expected adoption by July 1, 2030, and a hard entry-into-force date set for January 1, 2032.
Beyond the autonomous shipping breakthrough, the committee issued a formal resolution tackling the geopolitical crisis in the Middle East, calling on member nations to assist in the safe evacuation of international seafarers and cargo vessels currently trapped within the Persian Gulf and the Strait of Hormuz. The body urged immediate states to set up remote emergency helplines, distribute essential provisions, and expedite crew rotations for stranded maritime workers.
The 10-day assembly, chaired by Theofilos Mozas of Greece, also moved to clarify safety parameters for the industry's ongoing decarbonization transition. Regulators approved new interim safety guidelines for utilizing volatile ammonia cargo as primary ship fuel, alongside finalized crew training standards for handling both ammonia and methyl/ethyl alcohols.
Coastal tracking networks are also slated for significant structural overhauls. The committee approved pending SOLAS amendments that will guarantee coastal states free access to standard Long-Range Identification and Tracking position data. Maritime authorities noted the policy eliminates long-standing financial barriers, allowing developing coastal nations to better track illicit shipping, manage environmental pollution risks, and accelerate localized search-and-rescue response times.
In a parallel security upgrade targeting malicious maritime interference, the committee adopted a resolution integrating the advanced VHF Data Exchange System into the global regulatory architecture to eventually replace the legacy Automatic Identification System. Scheduled to become standard by January 2028, the upgraded communication network adds data authentication protocols explicitly engineered to neutralize electronic signal spoofing across commercial shipping routes.
Editor's Note: The newly adopted MASS Code applies specifically to commercial cargo vessels governed under Chapter 1 of the International Convention for the Safety of Life at Sea (SOLAS).