Classification society Korean Register (KR) has published a new report examining the safety challenges surrounding hydrogen as a marine fuel, as international regulators move closer to establishing formal guidelines for its use at sea, according to Ship & Bunker.
Regulatory Momentum Building
As reported by Ship & Bunker, KR shared its findings via an email statement this week, noting that the International Maritime Organization (IMO) is currently developing interim guidelines for hydrogen as a marine fuel — with approval anticipated in May 2026. The report is designed to help the maritime industry develop a clearer understanding of the risks involved and to support the safe rollout of hydrogen-powered vessels.
A Promising but Challenging Fuel
Hydrogen has attracted considerable interest as a decarbonisation pathway for shipping, largely because it produces no carbon emissions during use. Ship & Bunker also notes that hydrogen can serve as a feedstock for other alternative fuels such as methanol, potentially supporting broader future maritime supply chains.
However, KR’s report makes clear that the fuel presents significant safety considerations. As reported by Ship & Bunker, these include:
- High flammability — hydrogen is highly combustible and requires careful ignition risk management
- Material embrittlement — exposure can cause degradation of certain metals and structural materials
- Specialist handling requirements — the fuel demands dedicated procedures, training, and equipment
Storage Complexity Is a Major Technical Barrier
Among the most demanding challenges for onboard hydrogen use is storage. Ship & Bunker reports that hydrogen must be kept either under very high pressure or as a liquid at approximately -253°C. These extreme conditions make onboard storage systems and fuel supply arrangements far more complex than those used for conventional marine fuels.
Early Days for Widespread Adoption
Despite its long-term potential, hydrogen’s commercial uptake across the global fleet remains limited. As reported by Ship & Bunker, only a handful of vessels currently operate on hydrogen fuel, and widespread adoption is still considered many years away. KR’s report aims to help close knowledge gaps and lay the groundwork for a safer, better-informed transition as the industry continues to explore this alternative fuel path.
Gulf Bunkering does not provide operational or security guidance. This article is for informational purposes only. Operators should consult flag state authorities, P&I clubs, and relevant advisories for decisions relating to transit planning.
Sources: Ship & Bunker
