Switch Maritime and Incat Crowther secure USCG design basis for SWITCH-150

Switch Maritime and Incat Crowther have secured a Design Basis Agreement with the United States Coast Guard for the SWITCH-150 hydrogen fuel cell-electric fast ferry, a step the companies and observers describe as a notable regulatory milestone in the development of the vessel. MarineLink Maritime News reported the agreement on 4 November 2026.

The Design Basis Agreement, or DBA, formalises aspects of the regulatory engagement between the US Coast Guard and the design team for the SWITCH-150. It frames the regulatory approach that the vessel will follow as the design moves through the approval and certification pathway.

By reaching a DBA, the project clears a procedural hurdle that is commonly regarded in the industry as necessary before detailed design, testing and final certification progress in earnest. The agreement provides a shared understanding of the technical and safety standards against which the ferry will be assessed.

Hydrogen fuel cell-electric propulsion is central to the SWITCH-150 concept. The DBA with the United States Coast Guard recognises that regulatory bodies and designers must align early when novel propulsion systems are proposed for passenger-carrying craft.

Manufacturers and operators alike pay close attention to such agreements because they reduce uncertainty around compliance requirements. For new-technology vessels, that certainty can influence design choices, procurement decisions and the pace at which prototypes move into demonstration and commercial service.

What a Design Basis Agreement signifies

A DBA does not itself constitute full certification. Instead it documents the regulatory framework that will guide subsequent approvals. It typically sets out the assumptions, standards and design intent that the authority and the design team will use as a basis for later review.

For projects using unconventional fuel and power systems, early clarity on those bases is important. The agreement helps ensure that safety cases, redundancy strategies and system integration plans are examined against an agreed set of expectations from the outset.

Industry implications

The SWITCH-150 DBA will be watched by shipbuilders, engine and fuel-system suppliers, and ferry operators considering low-emission alternatives. Regulatory engagement of this kind tends to encourage investment by reducing the risk that major redesigns will be required late in the development cycle.

An accepted design basis also informs insurers and financiers about how regulatory risk is being managed. While it is not a guarantee of commercial success, the formal alignment with a national authority is frequently cited as a positive signal in negotiations over funding or commercial commitments.

Next steps for the design team

Following a DBA, typical next phases include refinement of detailed design, system integration testing and staged submission of evidence to the authority for certification. The process can involve iterative exchanges between designers and regulators as test data and analyses become available.

Switch Maritime and Incat Crowther will need to translate the agreed basis into demonstrable compliance through engineering, trials and documentation before any final approvals for the vessel’s operation can be granted. The DBA represents the framework for those efforts.

The announcement was reported by MarineLink Maritime News and reflects the continuing interest in hydrogen as an option for decarbonising short-sea and ferry operations. Early regulatory alignment remains a recurrent theme where new fuels and electric-propulsion technologies are proposed for passenger vessels.

Observers of maritime decarbonisation will consider the SWITCH-150 DBA a useful indicator of how authorities and designers are adapting procedures to accommodate emerging technologies. It is one element in a broader industry shift that includes technology development, shore-fuelling infrastructure and policy support.

The agreement does not by itself alter commercial plans or operational timetables, which will depend on subsequent design milestones, testing outcomes and final certification decisions. Nevertheless, by establishing a common regulatory baseline with the United States Coast Guard, Switch Maritime and Incat Crowther have taken a formal step that clarifies the path ahead for the SWITCH-150 project.