Home NI547 Guidelines for fuel cell systems onboard commercial ships This Guidance Note applies to fuel cell systems installations in ships using a gas as fuel and oxygen from ambient air as oxidant. Reference Title Edition NI547 R00 Guidelines for fuel cell systems onboard commercial ships Apr 2009 Check related documents: NR467 Rules for the classification of steel ships NR217 Rules for the classification of inland navigation vessels Check other Bureau Veritas rules and guidelines.