CII Indicator

With Oversea's CII support, you gain continuous visibility and control over your vessel's operational carbon intensity — going beyond compliance to actively manage performance throughout the year. The service monitors and analyses the factors driving your CII rating, identifying where emissions can be reduced and where operational or technical improvements will have the greatest impact.

By combining real-time operational data, IMO-aligned calculations, and Oversea's own analytical framework, the service tracks three complementary CII measures: the attained CII, which reflects actual year-to-date performance; the forecast CII, which projects likely year-end outcomes across different operational scenarios; and the ideal CII, which quantifies the improvement potential available through better technical performance in areas such as hull and propeller condition, main and auxiliary engines, and trim. Together, these three perspectives allow you to explain current results, anticipate future ratings, and prioritize the right actions with confidence.

The analysis accounts for the full range of factors influencing CII performance, including trading patterns, speed and power management, cargo utilization, weather exposure, and port and anchorage time. A rolling 12-month view is also available, providing a broader perspective on long-term efficiency trends beyond the annual compliance cycle.

As a customer you benefit from:

• Continuous monitoring of attained, forecast, and ideal CII across your fleet
• Daily support to detect unfavorable trends early and act before year-end
• Periodic reports with scenario-based forecasts and prioritized improvement measures
• Guidance on which operational and technical initiatives will deliver the most confidence in reaching your target CII rating