ClassNK has officially included the TEN-OH, Japan's pioneering hydrogen-fueled tugboat, on its vessel register.
Constructed by TSUNEISHI SHIPBUILDING Co., Ltd., the vessel is part of The Nippon Foundation's Zero Emission Ships Project. This initiative seeks to foster the development of ships without CO2 emissions.
Impacts of hydrogen fuel
During the planning phase of the TEN-OH, ClassNK coordinated with industry partners to meticulously review safety protocols and preventive measures for hydrogen-fueled vessels.
ClassNK coordinated with industry partners to meticulously review safety protocols
These reviews adhered to Part GF of ClassNK's 'Rules and Guidance for the Survey and Construction of Steel Ships,' focusing extensively on preventing explosions due to hydrogen's high ignitability.
The potential consequences of hydrogen fuel leakage were also considered, aiming to minimise any adverse effects on both crew members and the surrounding environment.
Safe operation of the vessel
Upon fulfilling the necessary inspections as prescribed by the pertinent class regulations, ClassNK registered the vessel officially on 9 October 2025. Looking ahead, ClassNK intends to persist in endorsing the vessel's safe operation through ongoing service inspections.
This endeavour not only reinforces safety but also supports industry-wide decarbonisation efforts. By utilising insights and experiences obtained from these surveys, ClassNK aims to refine its guidelines continuously and contribute meaningfully to the formulation of suitable international standards.
