Stolt Tankers is calling for improvements to what it believes are unfair carbon efficiency measures affecting its chemical tankers.

The Norwegian-owned company is the latest to add its voice to the chorus of criticism of the International Maritime Organization’s (IMO) Carbon Intensity Indicator (CII).

The shipowner said the measure is well-intentioned, but is causing headaches for the chemical tanker segment and may even prove counter-productive when it comes to reducing carbon emissions.