LNG as Fuel

Liquefied natural gas as a marine fuel cuts SOx to near zero and lowers NOx and CO2 at the engine, helping ships meet MARPOL Annex VI Regulation 14 and Regulation 13 without a scrubber or SCR. Its safety is governed by the IGF Code, mandatory under SOLAS Chapter II-1 from 1 January 2017. The main climate caveat is methane slip, unburned methane with a high global warming potential, which the IMO well-to-wake LCA guidelines (MEPC.391(81)) and the FuelEU and EU MRV frameworks now account for. Under a well-to-wake basis, the CO2-equivalent benefit of LNG narrows once upstream emissions and slip are counted.