CALLISTO: CO₂ emissions 2018–2022

CALLISTO 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 57,248 gross tonnage it is smaller than 53% 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 761 other vessels here, 193 of them oil tankers. The returns for 2018–2022 all give Monrovia as port of registry.

Its 1,629 t of CO₂ for 2022 is 77% below the median of 7,189 t among the 1,939 oil tankers on this register that reported for 2022. Per nautical mile it emitted 635.2 kg CO₂, 1.5 times the type median of 415.9 kg. It logged 216 hours at sea against a median of 1,731 hours for its type that year. 47.1% of its 2022 emissions were at berth; the median for oil tankers was 9.1%. Across 5 years with reported emissions, the highest was 2020 (19,179 t) and the lowest 2022 (1,629 t). Its efficiency percentile within the type went from 54 in 2018 to 55 in 2022 (lower is more efficient). The one sister ship listed below with a 2022 return reported a lower CO₂ per nautical mile.

Emissions by year2018–2022

Vessel particulars

IMO number

9299692

Previously reported as

NS CONCORD

MMSI

461000233

Call sign

A4DQ6

Ship type

Oil tanker

Gross tonnage

57,248

Length overall

244.0 m

Beam

42.0 m

Year built

2005

Flag state

Liberia Wikidata/AIS, undated

Builder

HD Hyundai Heavy Industries

Port of registry

Monrovia MRV 2022

Home port

Monrovia

Technical efficiency (design)

EIV (3.27 gCO₂/t·nm)

Verifier

Indian Register of Shipping, India

Accreditation

V 107

Compliance document issued

2023-05-30

Compliance document expires

2024-06-30

Efficiency against its own type2022

Position 968 of 1,771 qualifying oil tankers by EEOI, at the 55th percentile. The dashed line is the type median, 8.0; this vessel reported 8.5.

EEOI divides emissions by transport work, which for this vessel and year was 192,336,482 tonne-miles over 2,565 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2022 was 82.6% lower than in 2018, for EU/EEA voyages only.

From 2021 to 2022, emissions fell 88.6% while distance sailed fell 90.7%and CO₂ per nautical mile rose 22.6%.That points mainly to how much the vessel sailed, rather than the other.

Where the 2022 emissions occurred

Observed movementsAIS · Norwegian waters

First seen

31 Dec 2025

Last seen

10 Jan 2026

Days observed

3

Positions

172

Median speed

12.2 kn

Its recorded positions span 69.9°N to 71.0°N and 15.5°E to 19.1°E.

15 hourly points from 172 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.

Sanctions listings

Reproduced from the published source register as of the build date, and not legal advice. A listing attaches to the vessel with this IMO number; ownership and management may have changed since. Check the issuing authority before relying on it.

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 2018–2022, published by the European Commission.
• Vessel particulars: Wikidata (CC0).
• Movements: Norwegian Coastal Administration open AIS extract.
• Sanctions: ofac_sdn.

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

• OKYROE sister · 2004 · · 17,957 t · 469.1 kg/nm
• EUROLEADER sister · 2005 · · 14,889 t · 553.7 kg/nm
• CELINE sister · 2006 · · 6,615 t · 610.6 kg/nm
• EDOR sister · 2003 · 41,397 GT · 6,999 t · 357.5 kg/nm
• CAMILLA sister · 2003 · 41,679 GT · 4,895 t · 617.7 kg/nm
• NEW FUSION sister · 2004 · 42,432 GT · 4,214 t · 304.5 kg/nm
• ROSALIND sister · 2004 · 42,432 GT · 12,051 t · 443.1 kg/nm
• NORDMARS sister · 2004 · 42,432 GT · 4,795 t · 444.9 kg/nm