Home NI655 LNG Carrier conversion to FSRU or FSU This Guidance Note provides guidelines for the conversion of an existing liquefied natural gas carrier (LNG carrier) into a floating LNG gas storage unit (FSU) or a floating LNG gas storage unit fitted with a regasification plant (FSRU). Reference Title Date NI655 R00 LNG Carrier Conversion to FSRU or FSU Jul 2018 Check related documents: NR645 Rules for the classification of floating storage regasification units and floating storage units NR445 Rules for the classification of offshore units Check other Bureau Veritas rules and guidelines.