AHU C: CO₂ emissions 2018–2025

AHU C against its type

Built in 2004, it is 3 years older than the median general cargo ship on this register, which was built in 2007 (2,852 vessels with a known build year). It is one of 23 general cargo ships here under the San Marino flag, 0.7% of the 3,081 on the register. The same builder is recorded for 109 other vessels here, 35 of them general cargo ships. Its MRV returns name it AHU C for 2018–2023 and POLESTAR for 2024–2025. The reported port of registry changed: MAJURO (2018–2023), then San Marino (2024–2025).

Its 1,277 t of CO₂ for 2025 is 55% below the median of 2,820 t among the 2,469 general cargo ships on this register that reported for 2025. Per nautical mile it emitted 244.5 kg CO₂, 2.0 times the type median of 122.2 kg. It logged 572 hours at sea against a median of 3,044 hours for its type that year. 9.5% of its 2025 emissions were at berth; the median for general cargo ships was 4.3%. Across 3 years with reported emissions, the highest was 2025 (1,277 t) and the lowest 2018 (898 t). Its efficiency percentile within the type went from 39 in 2018 to 91 in 2023 (lower is more efficient). Of the 3 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

9278167

Previously reported as

POLESTAR

Ship type

General cargo ship

Year built

2004

Flag state

San Marino per EU MRV 2025

Builder

Hakodate Dock

Port of registry

San Marino MRV 2025

Home port

San Marino

Technical efficiency (design)

EEXI (6.72 gCO₂/t·nm)

Verifier

NORMEC VERIFAVIA SAS, France

Accreditation

3-2127

Compliance document issued

2026-05-20

Compliance document expires

2027-06-30

Efficiency against its own type2023

Position 301 of 331 qualifying general cargo ships by EEOI, at the 91st percentile. The dashed line is the type median, 21.1; this vessel reported 45.7.

EEOI divides emissions by transport work, which for this vessel and year was 26,773,622 tonne-miles over 5,726 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 42.3% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2019, 2020, 2021, 2022, so the series has gaps.

From 2023 to 2025, emissions rose 4.3% and CO₂ per nautical mile rose 14.4%.Distance is missing for at least one of the two years, so activity and efficiency cannot be separated here.

Where the 2025 emissions occurred

Methane, nitrous oxide and EU ETS2025

Total CO₂ equivalent

1,297 t

Methane (CH₄)

0.02 t

Nitrous oxide (N₂O)

0.07 t

Under EU ETS

775 t, 61% 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 4 MRV reporting years, an efficiency ranking, 3 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 vesselssister ships and nearest by tonnage

• PAPUA sister · 2003 · · 4,302 t · 214.9 kg/nm
• DEM FIVE sister · 2002 · 19,795 GT · 2,147 t · 235.9 kg/nm
• BINNUR C sister · 2003 · 19,795 GT · 3,615 t · 288.9 kg/nm
• CHIPOLBROK MOON 2004 · · 1,548 t · 228.2 kg/nm
• KAREWOOD PRIDE 2006 · · 2,569 t · 91.3 kg/nm
• WLADYSLAW ORKAN 2003 · · 3,436 t · 314.1 kg/nm
• KAREWOOD GLORY 2006 · · 3,122 t · 93.2 kg/nm
• AYITA · 3,303 t · 147.9 kg/nm