GFI Compliance - IMO Net-Zero Framework
Compute the IMO Net-Zero Framework compliance position for a given Attained GFI, calendar year, and annual energy used. Returns the Required GFI, the Direct Compliance Threshold, the Remediation Unit obligation (or Surplus Unit credit) in tonnes CO₂e, and the USD cost at a user-set RU price.
Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Required GFI for year | g CO₂e / MJ | |
| Direct Compliance Threshold for year | g CO₂e / MJ | |
| Well-to-wake baseline of the 2008 international shipping fuel mix | g CO₂e / MJ | |
| Required GFI reduction fraction for year | fraction | |
| DCT reduction fraction for year | fraction |
Source: IMO MEPC 83 (April 2025) - Net-Zero Framework approval document; IMO Resolution MEPC.377(80) - 2023 Revised IMO Strategy on Reduction of GHG Emissions from Ships; IMO MEPC.376(80) - 2024 Guidelines on Lifecycle GHG Intensity of Marine Fuels; IMO MEPC.391(82) - 2024 Update to LCA Guidelines (default pathway values)
In short
Compute the IMO Net-Zero Framework compliance position for a ship: Required GFI, Direct Compliance Threshold, Remediation Unit obligation, and USD cost at a user-set RU price.