NR671 Ammonia-fuelled ships - tentative rules

The purpose of this Rule Note is to provide a set of design and installation requirements for the classification of ships using ammonia as a fuel.

Reference	Title	Edition
NR671 R03	Ammonia-fuelled ships	February 2026

Check the list of main changes.

Check other Bureau Veritas rules and guidelines, including:

NR467 Rules for the classification of steel ships
NR529 Gas fuelled ships
NR670 Methanol and ethanol-fuelled ships
NR678 Hydrogen-fuelled ships
NR647 LPG-fuelled ships
NR547 Ships using fuel cells

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