Bulk carrier · Bahamas flag · built 2016

ALCOR: CO₂ emissions 2018–2025

IMO 9767314 EU ETS5 reporting years

CO₂ reported 2025: 6,062 t
Fuel burned: 1,942 t
Distance: 23,357 nm
Time at sea: 2,160 h
Emitted at berth: 2% of total
Share of year under way: 25%
Gross tonnage: 23,682

ALCOR against its type

Built in 2016, it is 4 years newer than the median bulk carrier on this register, which was built in 2012 (6,882 vessels with a known build year). At 23,682 gross tonnage it is smaller than 80% of the other 6,571 bulk carriers with a recorded tonnage. It is one of 218 bulk carriers here under the Bahamas flag, 2.7% of the 8,138 on the register. The same builder is recorded for 12 other vessels here, 3 of them bulk carriers. Its MRV returns name it ALCOR for 2018–2020, ST. COLUMBA for 2023 and ASTRO CASTOR for 2025. The returns for 2018–2025 all give Nassau as port of registry.

Its 6,062 t of CO₂ for 2025 is 1.9 times the median of 3,239 t among the 3,731 bulk carriers on this register that reported for 2025. Per nautical mile it emitted 259.5 kg CO₂, close to the type median of 260.7 kg. It logged 2,160 hours at sea against a median of 1,200 hours for its type that year. 2.0% of its 2025 emissions were at berth; the median for bulk carriers was 3.7%. Its efficiency percentile within the type went from 49 in 2023 to 56 in 2025 (lower is more efficient). Of the 6 comparable vessels 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	6,062	1,942	23,357	2,160	121	259.5	8.0	56
2023	2,636	839	11,334	976	187	232.6	7.9	49
2020	No EU/EEA voyages reported
2019	No EU/EEA voyages reported
2018	No EU/EEA voyages reported

Vessel particulars

IMO number: 9767314
Previously reported as: ST. COLUMBA, ASTRO CASTOR
Ship type: Bulk carrier
Gross tonnage: 23,682
Length overall: 181.0 m
Beam: 30.0 m
Year built: 2016
Flag state: Bahamas per EU MRV 2025
Builder: China Merchants Jinling Shipyard (Weihai)
Port of registry: Nassau MRV 2025
Technical efficiency (design): EEXI (4.79 gCO₂/t·nm)
Verifier: Bureau Veritas Certification France, France
Accreditation: 3-2047 rev. 4
Compliance document issued: 2026-03-26
Compliance document expires: 2027-06-30

Efficiency against its own type2025

Position 1,809 of 3,241 qualifying bulk carriers by EEOI, at the 56th percentile. The dashed line is the type median, 7.6; this vessel reported 8.0.

EEOI divides emissions by transport work, which for this vessel and year was 756,747,815 tonne-miles over 23,357 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 130.0% higher than in 2023, for EU/EEA voyages only. No return is recorded for 2021, 2022, 2024, so the series has gaps.

From 2023 to 2025, emissions rose 130.0% while distance sailed rose 106.1%and CO₂ per nautical mile rose 11.6%.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: 6,157 t
Methane (CH₄): 0.10 t
Nitrous oxide (N₂O): 0.35 t
Under EU ETS: 3,287 t, 54% of total

Verifier history

From reporting year	Verifier	Accredited in
2018	RINA Services Spa	Italy
2023	Bureau Veritas Certification France	France

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 5 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.