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Classification society Bureau Veritas (BV) has published requirements for ships which are designed and fitted out for dual-fuel or[ds_preview] LNG fuel propulsion but which are not initially intended to use gas as a fuel. The requirements, set out in Rule Note NR 627 Gas-Prepared Ships, cover special arrangements for new ships that are designed with specific arrangements to accommodate future installation of an LNG fuel gas system. Necessary spaces or zones to accommodate installations to be taken into account are bunkering station, storage tanks, fuel gas handling- and ventilation systems, GVU, GCU where required by NR529 and vent mast. Vessels meeting the standards will be awarded the notation Gas-Prepared. The notation may be modified with the addition of »S« when specific arrangements are implemented for the ship structure, »P« when specific arrangements are implemented for piping, »ME-DF« when the main engine is of the dual-fuel type and »AEB« when the auxiliary engines and oil-fired boilers are either of the dual fuel type, or designed for future conversion to dual fuel operation.