Calculation of the CO2 Index
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Marine Environment Protection Committee - MEPC/Circular.471 – Interim Guidelines for Voluntary Ship CO2 Emission Indexing for Use in Trials – (29 July 2005) - Annex - Interim Guidelines for Voluntary Ship CO2 Emission Indexing for Use in Trials - Appendix - Calculation of CO2 index based on operational data - Calculation of the CO2 Index

Calculation of the CO2 Index

 The basic expression for the Index is defined as:

Data covering a voyage or period, e.g. a day, in question with corresponding data on fuel consumption/cargo carried and distanced sailed for each voyage in a continuous sailing pattern could be collected as shown in the reporting sheet below.

CO2 Index reporting sheet

NAME AND TYPE OF SHIP:
Voyage or day Fuel consumption (FC) at sea and in port in tonnes Voyage or time period data
(i) Fuel type
( ) 		Fuel type
( ) 		Fuel type
( ) 		... Cargo
(m)
(tonnes or units) 		Distance
(D)
(NM)
1            
2            
3            
4            
..            
..            
             

If data is collected as fuel used in tonnes per voyage, cargo in tonnes and distance in nautical miles, the formula will be:

when summing for all voyages i=1 - n.

Note For voyages with mcargo =0, it is still necessary to include the fuel used during this voyage in the summation above the line.

Parent topic: Appendix - Calculation of CO2 index based on operational data
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