The adoption of liquid hydrogen as a marine fuel offers a transformative step toward achieving low and zero-carbon shipping.

This Guidnace Note has been meticulously developed to serve as a guidance resource for stakeholders involved in the marine industry, addressing the design, qualification and maintenance of liquid hydrogen systems. It consolidates best practices from aerospace, automotive, and cryogenic industries to bridge the existing knowledge gap within the maritime sector.
 
The philosophy of this guidance is to establish a comprehensive framework that addresses all critical aspects of liquid hydrogen systems, from their initial design and arrangement to commissioning, qualification, in-service inspection, and maintenance. Drawing from industry standards and proven methodologies, this document ensures that safety, reliability, and performance remain at the forefront of liquid hydrogen system applications. 
 
This Guidance Note provides details on materials selection, component design, and system layout, ensuring that all elements work cohesively under the unique challenges of marine applications.

By following this framework, stakeholders can understand and address critical considerations such as material compatibility, safety mechanisms, tank and piping integrity, and onboard integration, fostering a comprehensive understanding of liquid hydrogen systems for marine applications and their safe, efficient operation.