The International Maritime Organization (IMO) has adopted Resolution MEPC.353(78), issuing updated Guidelines on the Reference Lines for Operational Carbon Intensity Indicators (CII Reference Lines Guidelines, G2). These guidelines provide a standardized framework for assessing and benchmarking carbon intensity performance in the maritime sector.
Key Aspects of the CII Reference Lines
Establishing CII Benchmarks
- Reference lines are derived from 2019 operational carbon intensity data, serving as the baseline for future reductions.
- Each ship type (e.g., bulk carriers, tankers, container ships) has a specific reference line for CII calculations.
Standardized Calculation Methods
- The CII reference value is determined using median regression analysis of fuel consumption, ship capacity, and operational performance.
- Administrations and Recognized Organizations (ROs) will use these reference lines to evaluate compliance under MARPOL Annex VI.
Industry Impact and Compliance
- Ship operators must ensure their CII ratings improve annually to meet IMO’s carbon intensity reduction targets.
- Non-compliance may require corrective action plans to align with efficiency benchmarks.
Download Document PDFs Here: 2022 GUIDELINES ON THE REFERENCE LINES FOR USE WITH OPERATIONAL CARBON INTENSITY INDICATORS (CII REFERENCE LINES GUIDELINES, G2)