The IMO MASS Code: What Autonomous Ships Mean for Seafarers, Shore Teams, and Maritime Operations
- Vikas Pandey
- 9 hours ago
- 11 min read
On 22 May 2026, the International Maritime Organization concluded the 111th session of its Maritime Safety Committee in London. One outcome stood apart from the rest: the formal adoption of the International Code of Safety for Maritime Autonomous Surface Ships. The MASS Code takes effect on 1 July 2026.
Worth stating early: this is not a framework for ships that do not yet exist. Degree 1 autonomous vessels, carrying full crews alongside automated decision-support systems, are already operating commercially. Remotely controlled vessels are running short-sea routes. The MASS Code is the regulatory infrastructure that has been missing.
The Code lands differently depending on where you sit. Seafarers have questions about their careers and the certifications ahead of them. Technical superintendents and DPAs have questions about SMS compliance and flag state interaction. Maritime lawyers have questions that nobody has answered yet. MET institutions have a curriculum gap that just became urgent. Anyone with a stake in vessel economics has a new variable.
What follows covers each group in turn, using the Code's actual provisions and the IMO's confirmed timeline.
What Is the MASS Code?
The MASS Code is a goal-based, technology-neutral instrument adopted as a non-mandatory addition to the existing IMO regulatory framework. It sits alongside SOLAS, MARPOL, and the ISM Code, filling the space those instruments were never designed to address: ships operating with reduced or no crew.
The goal-based approach was the only practical option. The vessels falling under MASS span a wide range. A harbour ferry controlled from a nearby shore station presents a different compliance problem than a bulk carrier running a deep-sea route under algorithmic autonomy. A single prescriptive standard would have been either unworkably tight at one end or dangerously loose at the other.
Three new constructs enter the regulatory vocabulary with this Code.
Remote Control Center (ROC): A shore-based facility from which a MASS is operated. Flag states must certify ROCs, and a single ROC can operate multiple vessels simultaneously.
Remote Operator: The person at the ROC. Whether Remote Operators qualify as seafarers under the MLC, and what certification standards apply, is still being worked through at the international level.
MASS-specific certificates: Issued by flag administrations to both vessels and ROCs. Separate from and additional to existing SOLAS and ISM certification.
One provision will generate the most legal argument over the coming decade: a human master remains responsible for the vessel, whether or not the master is physically on board. The master must be able to intervene in operations. The algorithm does not carry the liability.
The Four Degrees of Autonomy
The MASS Code applies across four degrees of ship autonomy. The degrees vary on two questions: are seafarers on board, and where does operational control sit?
Degree | Vessel Description | Seafarers on Board? | Operational Control |
1 | Automated processes and decision support | Yes | Seafarers on board, supported by automation. Most conventional commercial vessels today. |
2 | Remotely controlled, seafarers on board | Yes | Shore control center and seafarers on board available to take over. |
3 | Remotely controlled, no seafarers on board | No | Shore control center only. Operational on short-sea routes and port service vessels. |
4 | Fully autonomous | No | Vessel's own operating system makes decisions. Not yet at commercial scale. |
Degrees 3 and 4 attract the headlines. Degree 1 is what most of the commercial fleet actually looks like. A modern bulk carrier or container ship with ECDIS, autopilot, and collision avoidance support already qualifies as a Degree 1 vessel under this framework. The MASS Code formalizes standards for those automated systems. It does not change the crew complement or the chain of command.
Getting to Degree 3 at scale on deep-sea trades is a different proposition. The infrastructure, liability frameworks, and commercial confidence required to run an unmanned vessel across the Pacific are not in place. The MASS Code's experience-building phase, starting in late 2026, is the process through which they will be tested.
The Timeline to Mandatory Compliance
The current Code is non-mandatory. The IMO has fixed a structured path to mandatory status:
Milestone | Description |
1 July 2026 | Non-mandatory MASS Code enters into force. Flag states may authorize vessels to operate under its provisions. |
December 2026 (MSC 112) | IMO establishes the Experience Building Phase (EBP) framework. Real-world MASS operations tracked and assessed to inform the mandatory Code. |
2028 | Mandatory MASS Code development begins, drawing on EBP findings and sub-committee reviews. |
2030 (target) | Mandatory MASS Code adopted by IMO. |
1 January 2032 | Mandatory MASS Code enters into force for the global fleet. |
Six years to mandatory compliance sounds like a long runway until you compare it to ECDIS, which took over a decade from IMO proposal to full fleet implementation. The MASS timeline is shorter and more compressed than anything the industry has seen for a fleet-wide technical change of this scope. Owners, managers, and training institutions that treat 2032 as a distant planning problem are reading the timeline wrong.
The experience-building phase deserves attention on its own terms. It is not a holding pattern. The operational data generated between 2026 and 2028 will directly shape the mandatory Code's provisions. Companies that participate in early MASS operations, or file EBP reports seriously, will have influence over the final mandatory framework. Those that don't will work with whatever comes out of that process.
Operational Implications for Ship Managers and Fleet Operators
For ship managers and technical operators, the first practical question is not whether every vessel must comply today. It is which vessels in the fleet sit at Degree 1 or above, and what documentation now applies to them.
Risk assessment is the compliance mechanism. The MASS Code requires risk assessments as part of the approval process for MASS operations. For Degree 1 vessels, this extends existing ISM Code SMS documentation. For operators moving toward Degree 2 or 3, the assessment burden is substantially heavier and needs flag administration involvement early, not at the certification stage.
Flag state interaction is now more complicated. Under SOLAS, the flag state certifies the vessel. Under the MASS Code, it must also certify the ROC. A Remote Control Center may sit in a different country from the flag state of the vessels it operates. Certifying a shore-based facility in one jurisdiction under another jurisdiction's flag administration is a compliance relationship with no established precedent. Engaging flag administrations on ROC certification requirements now, rather than waiting for published procedures, is the better approach.
Class societies are building the framework in parallel. DNV, Lloyd's Register, and Bureau Veritas were involved in MASS Code development and are developing class notations for autonomous operations. For vessels under class, the interaction between class requirements and MASS Code flag state certification needs to be resolved before the vessel operates under the new framework.
PSC inspection protocols for MASS do not yet exist. The Paris MOU and Tokyo MOU have not published their MASS compliance inspection frameworks. These are expected before the 2032 mandatory date. Fleet operators should monitor MOU publications and update pre-arrival checklists when they appear.
For superintendents and DPAs: SMS frameworks for vessels in MASS operations need to cover MASS risk assessment documentation, ROC certification records, Remote Operator qualification verification, and flag state certificate management. These are the documents PSC officers and flag state surveyors will request.
What the MASS Code Means for Seafarers
The question circulating in crew messes and officer groups: does this mean my job disappears? The direct answer is no, not now, and not across the fleet as a whole. But the answer needs to be specific.
Degree 1 covers most of the commercial fleet today. Seafarers remain on board. The MASS Code formalizes standards for the automated systems supporting them. Nothing changes about who is on the bridge or who is in command. A second officer on a well-automated bulk carrier is in the same professional position on 1 July 2026 as on 30 June.
The Degree 3 and 4 concern is real, but it is not a 2026 or 2030 question for deep-sea trades. Running an unmanned vessel on a Pacific bulk trade requires insurance architecture, liability settlement, and commercial infrastructure that is years from being in place. The 2032 mandatory date is when the regulatory framework takes hold, not when the fleet is already crewless. Seafarers on conventional deep-sea vessels have a runway measured in years, not quarters.
What changes near-term is the competency baseline. Degree 1 operations need crew who can monitor, interpret, and override automated systems. The STCW Code does not yet have updated provisions for this. Amendments are in development. Officers who get ahead of that shift through simulator training on advanced ECDIS and integrated bridge systems will be better positioned when the updated standards land.
The Remote Operator role is worth taking seriously as a career option. The work itself, monitoring vessel systems, applying collision regulations, managing emergencies from a shore station, is not far removed from what a deck officer does on a watch. The MASS Code requires ROC certification by flag states, with qualification standards building on STCW. Sea service is the baseline. Officers who have spent years in command have the strongest starting position for this role.
Senior officers should look at where the Code places accountability. The master remains legally responsible whether on board or operating remotely. That responsibility is not being automated away. As routine tasks shift toward automated systems, the judgment and command experience that justify the master's position become more concentrated in value, not less.
What the MASS Code Means for Shore-Based Maritime Professionals
Technical Superintendents and DPAs
If you manage vessels in MASS operations, your SMS needs to cover MASS risk assessments, revised procedures for automated functions, and the certification documentation for flag state MASS Certificates and ROC records. This is not a formatting exercise. It is a new compliance workstream that needs dedicated process ownership.
Maritime Education and Training (MET) Institutions
The STCW Code has no Remote Operator competency standards. The IMO finalized its human element framework at MSC 111, which sets the policy direction for certification. The STCW amendments to make that binding are in development. Institutions building Remote Operator training modules against the current IMO framework will have a finished product when those amendments land. Institutions waiting for finalized standards will be building under simultaneous commercial and regulatory pressure.
Marine Surveyors and Class Society Personnel
Inspecting a Degree 3 vessel requires skills that a conventional survey career does not build. Risk assessment review, software system verification, ROC inspection, and automated equipment audit are new technical domains. Class societies are building MASS-specific survey methodologies. Surveyors who develop early competency in MASS inspection have genuine professional differentiation in a field that is currently almost empty.
Maritime Lawyers and P&I Correspondents
The MASS Code anchors accountability with the master and the flag state. What it does not resolve is the liability chain below that: the ROC operator, the software developer, the system integrator, the shipowner. On a Degree 3 vessel involved in a casualty, that chain will be contested in courts with no precedent to draw on, and different jurisdictions will resolve it differently. This is an active specialty with very few practitioners and growing demand.
Shipbrokers and Maritime Finance Professionals
MASS class notations will affect vessel valuations and charter terms. A vessel whose design supports Degree 3 certification carries a different long-term OpEx profile than one that cannot. Financing decisions made over the next three to five years will still be active when that differentiation becomes commercially visible. Building the analytical framework for MASS-readiness assessment before demand peaks is the right timing.
New Roles the MASS Code Creates
Autonomous operations are not only a displacement story. The MASS Code creates roles that do not currently exist at commercial scale.
Remote Operator. Shore-based, operating vessels from a Remote Control Center, with flag-state certification required. At any meaningful scale, this role needs large numbers of trained people. The STCW-anchored qualification pathway gives experienced deck officers a structural advantage. Nobody else in the candidate pool starts with equivalent preparation.
MASS Compliance Officer. A dedicated function in any shipping company with significant MASS exposure in its fleet, managing the interface between MASS Code requirements, flag state certification, class surveys, ISM documentation, and PSC readiness. The role does not exist in most organizations today. It will become standard.
ROC Manager. Responsible for the operational management of a Remote Control Center running multiple vessels: shift scheduling, operator qualification oversight, equipment maintenance, and flag state reporting. The nearest existing analogue is a VTS manager, but the accountability scope and regulatory requirements are new.
Maritime Simulation and Training Specialist. Training Remote Operators for Degree 3 operations needs simulation platforms that most MET institutions do not have. Multi-vessel monitoring, shore-side systems integration, and emergency scenario management in a remote operation environment are different problems from bridge simulation. The field is small, the demand is coming.
Maritime Asset Economics and the MASS Transition
Crew costs on a medium-sized dry bulk carrier run between 30 and 40 percent of controllable OpEx, according to Drewry's Annual Ship Operating Costs report [add publication year]. On Degree 3 and 4 vessels, that cost does not disappear, it moves ashore: ROC staffing, software licensing, technology maintenance. Early operational data from autonomous vessel pilot programs, including Kongsberg and Rolls-Royce Marine, suggests the net operating cost reduction is positive but smaller than initial projections once ROC costs are fully loaded.
For shipowners and asset assessors, the MASS Code adds a dimension to vessel evaluation: whether the vessel's design supports future MASS certification, and what a retrofit pathway looks like. Bridge systems, communications infrastructure, and engine room automation standard all affect this. A vessel with MASS-compatible design has different long-term operational options than one requiring extensive modification. This sits alongside conventional assessment criteria: vessel age, class record, fuel profile, and charter market positioning.
Frequently Asked Questions
What is the MASS Code and when does it take effect?
The MASS Code is the International Code of Safety for Maritime Autonomous Surface Ships, adopted by the IMO at MSC 111 on 22 May 2026. It takes effect as a non-mandatory instrument on 1 July 2026. A mandatory version is targeted for adoption by 2030, with mandatory compliance entering into force on 1 January 2032.
Does the MASS Code mean seafarers will lose their jobs?
Not in the near term, and not across the fleet uniformly. Most commercial vessels today operate at Degree 1: seafarers remain on board, automated systems provide decision support. The transition to Degree 3 on deep-sea trades is a long-run development that the MASS Code's experience-building phase will begin to test. The near-term change for active seafarers is a rising automation competency requirement and a new certification pathway through the Remote Operator role.
What is a Remote Control Center, and who operates it?
A Remote Control Center is a shore-based facility from which a MASS is controlled and operated. It must be certified by the flag state of the vessels it operates. The personnel operating vessels from an ROC are called Remote Operators and will require qualifications drawing on STCW competency frameworks. Experienced deck officers are the most directly qualified candidate group under the developing certification standards.
How does the MASS Code interact with Port State Control inspections?
PSC officers will verify MASS Code compliance for vessels claiming MASS operations. The specific inspection protocols have not yet been published by the Paris MOU, Tokyo MOU, or equivalent regional bodies, and are expected before the 2032 mandatory date. Fleet operators should monitor MOU publications and ensure MASS-related SMS documentation is PSC-inspection-ready.
Who bears responsibility if a MASS vessel is involved in an accident?
Under the MASS Code, a human master remains responsible for the vessel in all operational modes, whether on board or operating remotely. Beyond the master, the full liability chain on a Degree 3 vessel, running through the ROC operator, software developer, shipowner, and flag state, is being developed in maritime law and P&I Club frameworks. No jurisdiction has fully settled these questions yet.
Conclusion
The Code has been adopted. The technology is not fully there, and the mandatory date is six years out. Neither of those facts is a reason to wait.
The experience-building phase starting in December 2026 will generate the evidence base for the mandatory Code. STCW amendments for Remote Operator certification are in development. PSC inspection protocols are being written. Class notations are being built. All of this is happening now, and the professionals engaged with it now will be ahead when the mandatory framework lands.
2032 is closer than it looks from 2026. For anyone managing vessels, training seafarers, assessing maritime assets, or writing charter contracts, that gap is the working window. Use it.
Capt. Vikas Pandey
Founder & CEO of Shipfinex
Capt. Vikas Pandey is Founder and CEO of Shipfinex, the first VARA-regulated (In-principle approval) platform for tokenized maritime asset participation. A mariner turned seasoned entrepreneur, he combines direct vessel operational experience with deep maritime finance expertise to build the infrastructure for accessible ship ownership.
