Green Ship Technology Team | PARK Giho, Senior Researcher                    

1. Background

Amid the global momentum toward achieving carbon neutrality, greenhouse gas(GHG) regulations

affecting the maritime industry are steadily becoming more stringent. 

In particular, the FuelEU Maritime regulation, effective since January 2025, highlights a significant

shift from conventional approaches that focused primarily on emissions during ship operations.

The regulation requires assessing greenhouse gas emissions across the entire fuel life cycle, from

production to onboard use.

This regulatory shift presents shipping companies with new challenges, as they must move beyond 

simple fuel consumption management toward a quantitative evaluation of the actual greenhouse

gas reduction effects achieved through the use of alternative fuels.

Strengthened FuelEU Maritime GHG Intensity Requirements

Well to Wake Pathway

2. About the Software

KR has developed a WtW (Well-to-Wake)–based ship greenhouse gas emissions calculation software

to provide technical baseline data for establishing ship-specific regulatory compliance strategies.

Its primary function is to automatically calculate greenhouse gas emissions and potential reductions

from a WtW perspective when a ship uses various types of fuels, including conventional fossil fuels

as well as low- and zero-carbon alternative fuels.

■ Key Features
1) Automatic calculation of WtW-based GHG emissions based solely on fuel information input

2) Application of emission factors and regulatory criteria that reflect the requirements of the FuelEU 

     Maritime regulation

3) Intuitive presentation of ship-specific GHG Intensity as well as Compliance Balance (CB) surplus

     and deficit values

4) System architecture designed to incorporate IMO GFI framework regulation requirements in the

     future

■ Software Description
Thanks to its automation of complex calculation processes, the software enables users to leverage

calculation results with ease and enhance speed.

The software workflow consists of the following steps:

[Login] → [Verification of base factors] → [Ship registration] → [Fuel consumption input] →

[Emissions calculation] → [Report review and output].

Fuel consumption input