b'elements of a DBA and the DBA process can be found inels with a flashpoint below 60 C), the current edition the guidance released by the Coast Guards Office of De- only contains prescriptive requirements for natural gas. sign and Engineering Standards: CG-ENG Policy LetterOther low-flashpoint fuels, such as hydrogen and methyl 01-23-DesignBasisAgreementSubmissionGuidancealcohol, can be addressed through an alternative design (March 17, 2023). equivalency process specified in the IGF Code. Hydrogen fuel has been approved for recent novel designs aiming to STANDARDS ANALYSIS achieve zero carbon emissions after considering various Historically,theCoastGuardhasencounteredavari- factorsthatmayaffectsafeimplementationandoper-ety of alternative fuel types in design review, to includeation,includinghydrogenstoragemethods,hydrogen liquified natural gas (LNG), hydrogen, lithium-ion bat- embrittlement,leakratesandgasdetectionmeasures, teries, and methyl and ethyl alcohol fuels. The primary focus in the review of these designs is given to the vital systems, including fuel systems, hazardous locations, gas detection, and vessel fire protection capabilities to allowHydrogen fuel has been for a complete review of fuel-specific safety and reliability considerations. The International Code of Safety for Shipapproved for recent novel Using Gases or Other Low-Flashpoint Fuels (IGF Code) permits deviations from the prescribed requirements ifdesigns aiming to achieve the intent of the requirement is satisfied. While the scope of the IGF Code covers all low-flashpoint fuels (i.e., fu- zero carbon emissions Clean, Quiet, ProvenElectric and Hybrid PropulsionKeeping our waterways clean is importantto the health and survival of our planet.BAE Systems is leading the way with clean, quiet alternative propulsion systems, helping passenger vessels get to zero emissions.gettozero.com37 AUGUST 2023'