> ## Documentation Index
> Fetch the complete documentation index at: https://docs.appliedaifoundation.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Compliance frameworks at a glance

> Side-by-side comparison of the five maritime regulations supported by the platform.

The shipping industry now has five overlapping reporting regimes. Each measures something slightly different, has a different deadline, and goes to a different authority. The platform handles all five from the same dataset.

## Comparison

| Framework           | Authority              | Scope                        | What we calculate                                             | What we generate            | Deadline     |
| ------------------- | ---------------------- | ---------------------------- | ------------------------------------------------------------- | --------------------------- | ------------ |
| **IMO CII**         | Flag State / IMO       | Ships ≥ 5,000 GT             | Attained CII, Required CII, A–E rating, reefer-corrected CII  | CII Statement of Compliance | 31 March     |
| **EU ETS**          | EU Verifier            | Voyages calling EU/EEA ports | Voyage classification, covered CO₂, phase-in factor, EUA cost | EU ETS Report               | 30 September |
| **FuelEU Maritime** | EU Verifier            | Energy used in EU/EEA waters | WtW GHG intensity, compliance balance, penalty                | FuelEU Report               | 31 January   |
| **EU MRV**          | EC THETIS-MRV          | Voyages calling EU/EEA ports | Voyage-level CO₂, distance, fuel mix                          | EU MRV Report               | 31 March     |
| **IMO DCS**         | Flag State / IMO GISIS | Ships ≥ 5,000 GT             | Annual fuel consumption, distance, hours underway             | IMO DCS Report              | 31 March     |

## How they interlock

<CardGroup cols={2}>
  <Card title="One dataset, five outputs" icon="layer-group">
    All five reports are computed from the same consumption logs you upload. Upload once; generate everything.
  </Card>

  <Card title="Year-aware throughout" icon="calendar">
    CII reduction factors, ETS phase-in, FuelEU targets — all change by year. Pick the year and every number updates.
  </Card>

  <Card title="Voyage-leg precision" icon="route">
    EU ETS coverage is applied per-leg using BOSP-based segmentation, not whole voyages. The EU MRV report follows the same model.
  </Card>

  <Card title="Audit-ready trace" icon="file-shield">
    Every figure is back-traceable to the consumption log row that produced it.
  </Card>
</CardGroup>

## Read the primers

<CardGroup cols={2}>
  <Card title="IMO CII" icon="leaf" href="/concepts/cii">
    Carbon Intensity Indicator, A–E ratings, reduction trajectory through 2030.
  </Card>

  <Card title="EU ETS" icon="building-columns" href="/concepts/eu-ets">
    Voyage classification, coverage factors, phase-in 2024–2026.
  </Card>

  <Card title="FuelEU Maritime" icon="droplet" href="/concepts/fuel-eu">
    WtW GHG intensity, 19 fuel types, banking & pooling, €2,400/t penalty.
  </Card>

  <Card title="EU MRV" icon="file-lines" href="/concepts/eu-mrv">
    Voyage-level CO₂ reporting under Regulation (EU) 2015/757.
  </Card>

  <Card title="IMO DCS" icon="ship" href="/concepts/imo-dcs">
    Annual fuel data submission via flag state to IMO GISIS.
  </Card>
</CardGroup>