Oil tanker · Malta flag · built 2010
ENDLESS SUMMER: CO₂ emissions 2018–2025
IMO 9425540 EU ETS6 reporting years
- CO₂ reported 2025
- 15,998 t
- Fuel burned
- 5,025 t
- Distance
- 34,229 nm
- Time at sea
- 3,060 h
- Emitted at berth
- 24% of total
- Share of year under way
- 35%
- Gross tonnage
- 28,418
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ENDLESS SUMMER against its type
Built in 2010, it is the same age as the median oil tanker on this register (build year 2010, 2,896 vessels with a known build year). At 28,418 gross tonnage it is smaller than 83% of the other 2,841 oil tankers with a recorded tonnage. It is one of 289 oil tankers here under the Malta flag, 8.1% of the 3,548 on the register. The same builder is recorded for 103 other vessels here, 61 of them oil tankers. Its MRV returns name it MARIPOSA for 2018, ENDLESS SUMMER for 2020–2022 and SAN MARCOS for 2024–2025. The reported port of registry changed: Nassau (2018), then Majuro, Marshall Islands (2020–2022), then Valletta (2024–2025).
Its 15,998 t of CO₂ for 2025 is 2.0 times the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 467.4 kg CO₂, 16% above the type median of 403.2 kg. It logged 3,060 hours at sea against a median of 2,030 hours for its type that year. 23.9% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 6 years with reported emissions, the highest was 2025 (15,998 t) and the lowest 2020 (1,476 t). Its efficiency percentile within the type went from 40 in 2018 to 97 in 2025 (lower is more efficient). Of the 5 sister ships listed below with a 2025 return, 5 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 15,998 | 5,025 | 34,229 | 3,060 | 3,817 | 467.4 | 28.0 | 97 |
| 2024 | 5,511 | 1,745 | 18,493 | 1,517 | 324 | 298.0 | 9.7 | 19 |
| 2022 | 2,067 | 661 | 8,393 | 648 | 65 | 246.3 | 13.1 | 36 |
| 2021 | 3,106 | 991 | 10,458 | 873 | 128 | 297.0 | 17.3 | 56 |
| 2020 | 1,476 | 471 | 4,368 | 420 | 0 | 337.9 | 10.9 | 19 |
| 2018 | 10,372 | 3,302 | 31,359 | 4,288 | 933 | 330.8 | 14.6 | 40 |
Vessel particulars
- IMO number
- 9425540
- Previously reported as
- MARIPOSA, SAN MARCOS
- Ship type
- Oil tanker
- Gross tonnage
- 28,418
- Length overall
- 182.5 m
- Beam
- 32.2 m
- Year built
- 2010
- Flag state
- Malta per EU MRV 2025
- Builder
- Onomichi Dockyard
- Port of registry
- Valletta MRV 2025
- Home port
- Valletta
- Technical efficiency (design)
- EEXI (4.84 gCO₂/t·nm)
- Verifier
- RINA Services Spa, Italy
- Accreditation
- 002O
- Compliance document issued
- 2026-03-12
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 1,403 of 1,448 qualifying oil tankers by EEOI, at the 97th percentile. The dashed line is the type median, 7.5; this vessel reported 28.0.
EEOI divides emissions by transport work, which for this vessel and year was 570,745,273 tonne-miles over 34,229 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 54.2% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2019, 2023, so the series has gaps.
From 2024 to 2025, emissions rose 190.3% while distance sailed rose 85.1%and CO₂ per nautical mile rose 56.8%.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 16,245 t
- Methane (CH₄)
- 0.25 t
- Nitrous oxide (N₂O)
- 0.90 t
- Under EU ETS
- 12,841 t, 80% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Lloyd's Register Quality Assurance Ltd | United Kingdom |
| 2020 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2024 | RINA Services Spa | Italy |
A change of verifier is not in itself a sign of anything being wrong.
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2018–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
This page draws on 6 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: AIS movements in Norwegian waters, a sanctions listing and US port state inspections.
Empty means unreported, never zero. How EEOI, distance, percentiles and sister ships are handled is explained under reading a vessel page. Something wrong? See corrections.