ATHENS STAR: CO₂ emissions 2018–2025

ATHENS STAR against its type

Built in 2005, it is 5 years older than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 41,966 gross tonnage it is smaller than 65% of the other 2,841 oil tankers with a recorded tonnage. It is one of 40 oil tankers here under the Isle of Man flag, 1.1% of the 3,548 on the register. Its MRV returns name it ATHENS STAR for 2018–2022 and VS PROSPERA for 2024–2025. The returns for 2018–2025 all give Douglas as port of registry.

Its 8,242 t of CO₂ for 2025 is close to the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 389.3 kg CO₂, close to the type median of 403.2 kg. It logged 1,962 hours at sea against a median of 2,030 hours for its type that year. 5.1% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 4 years with reported emissions, the highest was 2025 (8,242 t) and the lowest 2022 (3,361 t). Its efficiency percentile within the type went from 66 in 2018 to 72 in 2025 (lower is more efficient). The one comparable vessel listed below with a 2025 return reported a higher or equal CO₂ per nautical mile.

Emissions by year2018–2025

Vessel particulars

IMO number

9298313

Previously reported as

VS PROSPERA

Ship type

Oil tanker

Gross tonnage

41,966

Length overall

229.0 m

Beam

32.3 m

Year built

2005

Flag state

Isle of Man per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list United Kingdom. The flag shown is from the newest official source, the EU MRV return for 2025.

Port of registry

Douglas MRV 2025

Technical efficiency (design)

EEXI (4.1 gCO₂/t·nm)

Verifier

DNV, Germany

Accreditation

VS-16026-01

Compliance document issued

2026-04-10

Compliance document expires

2027-06-30

Efficiency against its own type2025

Position 1,036 of 1,448 qualifying oil tankers by EEOI, at the 72nd percentile. The dashed line is the type median, 7.5; this vessel reported 10.0.

EEOI divides emissions by transport work, which for this vessel and year was 827,495,984 tonne-miles over 21,170 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 19.7% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2020, 2021, 2023, so the series has gaps.

From 2022 to 2025, emissions rose 145.2% while distance sailed rose 155.5%and CO₂ per nautical mile fell 4.0%.That points mainly to how much the vessel sailed, rather than the other.

Where the 2025 emissions occurred

Methane, nitrous oxide and EU ETS2025

Total CO₂ equivalent

8,371 t

Methane (CH₄)

0.13 t

Nitrous oxide (N₂O)

0.47 t

Under EU ETS

4,416 t, 54% of total

Verifier history

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).

This page draws on 5 MRV reporting years, an efficiency ranking, 4 of 5 vessel particulars and a name history. Not found in the sources for this vessel: AIS movements in Norwegian waters, a licensed photograph, 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.

Comparable vesselsnearest by tonnage, same type

• BRIONT 2004 · 41,913 GT · 3,927 t · 388.3 kg/nm
• HAMBURG STAR 2005 · 41,966 GT · 2,672 t · 471.5 kg/nm
• ALBARRAQ Z 2003 · 41,913 GT · 2,016 t · 448.3 kg/nm
• LONDON STAR 2006 · 41,966 GT · 10,458 t · 442.1 kg/nm
• ALPINE PERSEFONE 2008 · 41,696 GT · 3,595 t · 351.2 kg/nm
• AMALIA 2006 · 41,966 GT · 8,480 t · 364.0 kg/nm
• ADENA 2003 · 41,679 GT · 8,182 t · 498.7 kg/nm
• VALENTE 2005 · 41,994 GT · 6,092 t · 412.2 kg/nm