> ## 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.

# EU MRV

> Monitoring, Reporting, and Verification — voyage-level CO₂ data for THETIS-MRV submission.

## What it is

EU MRV (Monitoring, Reporting, Verification) is the EU's data-collection regime for maritime CO₂ — the prerequisite to EU ETS. Operators submit verified voyage-level emissions data through the EC's THETIS-MRV system every year.

## Who it applies to

Ships **5,000 GT and above** on voyages calling EU/EEA ports — Regulation (EU) 2015/757.

## What gets reported

For every voyage in the reporting year:

* Departure and arrival ports (with UN/LOCODE)
* Distance travelled
* Time at sea, time at port
* CO₂ emissions broken down by voyage segment
* Fuel consumption by type (HFO, VLSFO, LFO, MDO, MGO, LNG, methanol, biofuel)
* Cargo carried
* Voyage classification (intra-EU, into-EU, out-of-EU, non-EU)

Plus annual roll-ups: total CO₂, total distance, total fuel by type, and data-quality indicators (record count, completeness).

## What the platform calculates

The platform uses the same `VoyageSegmentService` that powers the EU ETS and vessel-detail pages. That means MRV report figures **match** what you see in the dashboard, voyage-by-voyage, with no separate "report-time" recalculation.

For each voyage segment the report includes:

* Segment ID (e.g. `99W-1`, `99W-2` for repeated voyage numbers)
* Start/end timestamps
* Departure and arrival ports + UN/LOCODE
* Voyage type (INTRA\_EU / INTO\_EU / OUT\_OF\_EU / NON\_EU)
* Total CO₂ for the segment
* Total distance for the segment
* Fuel-mix breakdown for the segment
* Record count (data-quality flag)

## Output

A **JSON-format EU MRV report** at `/api/reports/eu-mrv/[imo]?year=YYYY`, plus a downloadable PDF version from the [Reports hub](/product/reports-hub). The data structure is THETIS-MRV-compatible.

<Frame caption="The EU MRV report card on the Reports hub. Vessel-level — pick a vessel first.">
  <img src="https://mintcdn.com/metaweaveconsultant/ZChQsW2FZuO2wFx2/images/reports/eu-mrv-card.png?fit=max&auto=format&n=ZChQsW2FZuO2wFx2&q=85&s=e4e3740b2476e97a1aea9a63a423760d" alt="EU MRV report card" width="2880" height="1800" data-path="images/reports/eu-mrv-card.png" />
</Frame>

## Deadline

**31 March** of each year, for the previous calendar year, submitted via THETIS-MRV.

## Reference

### Primary regulation

* [Regulation (EU) 2015/757 (consolidated)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A02015R0757-20240101) — Monitoring, Reporting, Verification of CO₂ from maritime transport

### Submission

* [EC THETIS-MRV portal](https://mrv.emsa.europa.eu/) — submission system run by EMSA

### Industry guidance

* [DNV — EU MRV](https://www.dnv.com/maritime/insights/topics/eu-mrv/)