DUOMO SQUARE: CO₂ emissions 2018–2025

DUOMO SQUARE against its type

Built in 2018, it is 8 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 62,508 gross tonnage it is larger than 59% of the other 2,841 oil tankers with a recorded tonnage. It is one of 718 oil tankers here under the Liberia flag, 20.2% of the 3,548 on the register. The same builder is recorded for 194 other vessels here, 56 of them oil tankers. Its MRV returns name it SALAMINA for 2018–2020, DUOMO SQUARE for 2021–2022 and HAIFENG for 2023–2025. The reported port of registry changed: Piraeus (2018–2020), then Monrovia (2021–2025).

Its 13,056 t of CO₂ for 2025 is 1.6 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 379.9 kg CO₂, close to the type median of 403.2 kg. It logged 3,000 hours at sea against a median of 2,030 hours for its type that year. 7.2% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 7 years with reported emissions, the highest was 2020 (18,036 t) and the lowest 2018 (2,901 t). Its efficiency percentile within the type went from 62 in 2018 to 64 in 2025 (lower is more efficient). Of the 8 sister ships listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.

Emissions by year2018–2025

Vessel particulars

IMO number

9792840

Previously reported as

SALAMINA, HAIFENG

MMSI

636020805

Call sign

5LAU7

Ship type

Oil tanker

Gross tonnage

62,508

Length overall

250.0 m

Beam

44.0 m

Year built

2018

Flag state

Liberia per EU MRV 2025

Builder

Shanghai Waigaoqiao Shipbuilding

Port of registry

Monrovia MRV 2025

Home port

Monrovia

Ice class

IA

Technical efficiency (design)

EEDI (3.18 gCO₂/t·nm)

Verifier

AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD), Greece

Accreditation

1083-2

Compliance document issued

2026-03-25

Compliance document expires

2027-06-30

Efficiency against its own type2025

Position 923 of 1,448 qualifying oil tankers by EEOI, at the 64th percentile. The dashed line is the type median, 7.5; this vessel reported 8.7.

EEOI divides emissions by transport work, which for this vessel and year was 1,505,898,501 tonne-miles over 34,364 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 350.1% higher than in 2018, for EU/EEA voyages only.

From 2023 to 2025, emissions rose 17.4% while distance sailed rose 5.4%and CO₂ per nautical mile rose 11.4%.That points mainly to how efficiently it sailed, rather than the other.

Where the 2025 emissions occurred

Methane, nitrous oxide and EU ETS2025

Total CO₂ equivalent

13,260 t

Methane (CH₄)

0.21 t

Nitrous oxide (N₂O)

0.75 t

Under EU ETS

7,399 t, 57% of total

Laden voyages2025

CO₂ on laden voyages

5,744 t, 44% of total

Fuel, laden

1,826 t

CO₂ per nm, laden

341.7 kg

The rest of the 2025 total was emitted on ballast legs or at berth.

Observed movementsAIS · Norwegian waters

First seen

01 Dec 2025

Last seen

19 Jul 2026

Days observed

31

Positions

1,363

Median speed

11.2 kn

Its recorded positions span 58.0°N to 60.9°N and 4.4°E to 6.2°E.

323 hourly points from 1,363 positions. Filled circle first, open circle last; squares are ports for orientation, not calls.

Positions recorded per month

Norwegian Coastal Administration open AIS, Norwegian waters only, 01 Jul 2025 to 27 Jul 2026. A gap means the vessel was not recorded here, not that it was idle or that a transponder was off.

Port state inspectionsUnited States waters

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).
• Movements: Norwegian Coastal Administration open AIS extract.
• Inspections: USCG PSIX.

This page draws on 8 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, AIS movements in Norwegian waters, a name history and US port state inspections. Not found in the sources for this vessel: a licensed photograph and a sanctions listing.

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 vesselssister ships and nearest by tonnage

• VICTORY VENTURE sister · 2017 · 61,990 GT · 17,325 t · 332.7 kg/nm
• TENACITY VENTURE sister · 2017 · 61,990 GT · 15,286 t · 342.3 kg/nm
• HAI SHANG sister · 2018 · 62,508 GT · 13,501 t · 440.9 kg/nm
• ALKINOOS sister · 2019 · 62,508 GT · 11,651 t · 416.8 kg/nm
• ARCHELAOS sister · 2019 · 62,508 GT · 4,034 t · 457.6 kg/nm
• MARFA sister · 2017 · 82,361 GT · 3,939 t · 456.4 kg/nm
• KAREKARE sister · 2017 · 82,870 GT · 15,531 t · 475.2 kg/nm
• SAMSARA sister · 2017 · 82,870 GT · 9,603 t · 478.2 kg/nm