Here is a nice paper prepared by the Blue Sky Maritime Coalition that challenged its members to achieve an even more ambitious goal of achieving “net zero” emissions by 2050.
This paper aimed to illustrate the flaws of the carbon measurement methods currently proposed by the IMO, especially of the CII regulation, including the impact of the Charterer’s decisions, the short voyages, and the frequent waiting time.
The nine exact sister ships have been studied. The ships have the same engine design, propeller, hull form, and nearly identical attained EEXIs.
However, the CII scores based on CO2 emissions and distance traveled in 2020 vary.
The variance has to do with the commercial profiles, the effect of the average voyage length, and the amount of time they are required to wait due to port congestions.
A visual description of the different operating profiles of the two sister ships in 2020:
What do you believe?
Should the CII calculation include correction factors for the short voyages and waiting time?