LNG carrier owners have always liked to think their vessels are a bit special. When it comes to the Energy Efficiency Existing Ship Index and Carbon Intensity Indicator regulations, they may have a point.

The 700-vessel global LNG fleet is split into three distinct groups. Two of these — the steam turbine ships and their tri-fuel and dual-fuel diesel-electric (TFDE and DFDE) cousins, which together account for two-thirds of the full-size LNG carriers trading today — will be hardest hit by the CII ratings in particular.