hydrogen ferry – RINA has issued an Approval in Principle for a hydrogen fuel cell retrofit concept on a fast passenger ferry, covering generator substitution, safety, and regulatory compliance—an early milestone for cleaner maritime travel.
Hydrogen fuel is moving from prototypes toward real-world passenger routes, at least in one important piece of the engineering puzzle: safety and feasibility.
RINA has granted an Approval in Principle (AiP) to ST Engineering Marine for a retrofit concept that would replace one auxiliary diesel generator set onboard the Asean Raider I. a 25-metre fast passenger ferry operated by BatamFast.. The plan centers on installing a hydrogen-powered fuel cell system supported by supplementary lithium-ion batteries.. In practical terms. the AiP is not a green light to install hardware everywhere—rather. it is a formal early-stage assessment that the concept can be developed in a way that meets technical and regulatory expectations for passenger operations.
The AiP was formally presented to ST Engineering Marine during Singapore Maritime Week.. That timing matters because it signals how quickly maritime players are trying to turn alternative fuels into workable systems. not just headlines.. The assessment framework used by RINA followed its process for novel technologies. guided by classification rules and international safety and stability standards. including the IGF Code. which addresses ships using gases or other low-flashpoint fuels. and requirements related to intact stability.
For the ferry operator and the engineers, the key challenge is integration.. Retrofitting an existing vessel means working within real constraints: where equipment can physically fit. how energy systems behave under different operating modes. and how safety measures would be designed for a passenger environment.. By covering the substitution of an auxiliary diesel generator with hydrogen fuel cells—while pairing that setup with lithium-ion batteries—ST Engineering Marine is aiming for a configuration that can manage power demand smoothly.. Batteries can help balance short-term electrical loads. while fuel cells provide a longer-duration power source—an approach that can reduce carbon emissions without sacrificing day-to-day performance.
A major strength of the AiP approach is that it forces a structured conversation before detailed design begins.. RINA’s assessment activities were carried out by its South Asia Pacific Plan Approval Centre. focusing on this novel application of hydrogen fuel cell technology to an existing fast passenger ferry.. Instead of treating innovation as a leap of faith. the process evaluates whether the concept can plausibly comply with the rules that govern ship safety and operational reliability.
There’s also a broader industry signal here.. Maritime decarbonization is often slowed by the gap between “conceptually cleaner” and “certifiably safe.” Fuel cells using hydrogen can offer a pathway to lower emissions. but onboard systems involve complexities—storage. handling. ventilation. and emergency response considerations—that must align with established maritime standards.. The AiP milestone reduces uncertainty for stakeholders. from designers to regulators. by identifying what is feasible now and what needs refinement as the project moves from idea to detailed engineering.
From a human perspective. passengers care less about fuel chemistry and more about whether a vessel feels steady. safe. and dependable.. A retrofit that targets auxiliary power rather than the main propulsion system can be a pragmatic stepping stone.. It may allow developers to validate hydrogen fuel cell performance in real operating patterns on a smaller scale—particularly relevant for fast ferry routes where electrical demand can fluctuate and timetables are tight.
The engineers involved framed the AiP as a milestone in expanding retrofit capabilities and validating the robustness of their integration concept.. ST Engineering Marine’s Deputy President for Marine. Lim Nian Hua. described the certificate as a feasibility checkpoint for introducing hydrogen fuel cell technology into maritime operations with a continued focus on safety and regulatory compliance.. ST Engineering Marine’s project leadership also emphasized that AiP can be an effective tool for assessing innovative solutions early—helping transition concepts into more detailed design work for existing vessels.
If this retrofit path progresses, it could help shape how hydrogen is adopted across regional fleets.. The next steps typically move from feasibility toward detailed engineering. system design. and the kinds of checks that verify performance. safety systems. and compliance at a level that supports actual operation.. For an industry under pressure to cut emissions while maintaining service quality, those transitions matter.. In the near term. AiP doesn’t eliminate technical risk—but it organizes it. making it easier to address before costs and schedules lock in.
For RINA and ST Engineering Marine. the AiP also demonstrates a broader shift in how maritime innovation is managed: not as a single dramatic test. but as staged assurance aligned with classification and international rules.. That incremental model may ultimately determine which low-emission technologies move from pilots to fleets—and how quickly passengers will see cleaner energy on routes they already take.