The CII grade for a year is calculated from that year’s verified data. That is why the grade cannot be managed after the year ends, and also why a D forecast in the middle of the year is a decision point and not a verdict. Every voyage still to be sailed adds to the result.

This post is a playbook for that moment. It assumes you already know what CII is and how the A to E scale works. If not, start with What is CII in shipping? and CII compliance in shipping.

Confirm the forecast is built on clean data

A forecast is only as good as the fuel and distance figures behind it. Before changing how a ship is run, check that consumption has been reported correctly and that fuel used for purposes other than propulsion is allocated properly. On tankers, sub-consumers such as cargo heating, cargo transfer pumps, inert gas systems, auxiliary boilers, generators and ballast…