CII Monitoring & Optimisation

Overview

The Carbon Intensity Indicator (CII) framework rates every vessel's carbon efficiency on an A-to-E scale, with rating thresholds tightening every year. A D rating for three consecutive years, or a single E rating, triggers a mandatory corrective action plan — and increasingly, charterers and financiers are using CII ratings as commercial selection criteria.

LegaSea's CII Monitoring & Optimisation service provides real-time CII tracking, end-of-year rating prediction, and actionable recommendations to maintain or improve your vessel's rating. We combine voyage data analysis with technical expertise to identify the most cost-effective measures for each vessel.

Our approach is proactive — we don't wait until year-end to discover a poor rating. Instead, we monitor CII trajectory throughout the year and intervene early when performance trends indicate a potential downgrade.

CII Services We Deliver

• Continuous CII calculation and rating prediction based on real-time voyage data
• Year-end rating forecasting with scenario analysis for different operational profiles
• Operational optimisation recommendations — speed, trim, route, and port time
• Technical measures assessment — hull cleaning, propeller polishing, engine tuning
• CII corrective action plan development for vessels at risk of D or E ratings
• Fleet-wide CII benchmarking and performance comparison reporting
• Voyage-specific CII impact analysis for chartering and commercial decisions
• Regulatory compliance monitoring — tracking evolving CII thresholds and rules

Why LegaSea for CII Monitoring?

• Real-time monitoring — not retrospective annual calculations
• Actionable recommendations that balance CII improvement with commercial performance
• Proven results — average 8% CII improvement for monitored vessels within first year
• Integration with SEEMP Part III for seamless compliance documentation
• Expertise across all vessel types and trading patterns