SIERRA QUEEN: CO₂ emissions 2018–2025

SIERRA QUEEN against its type

Built in 1996, it is 2 years newer than the median refrigerated cargo carrier on this register, which was built in 1994 (183 vessels with a known build year). At 5,918 gross tonnage it is smaller than 88% of the other 178 refrigerated cargo carriers with a recorded tonnage. It is one of 96 refrigerated cargo carriers here under the Bahamas flag, 47.5% of the 202 on the register. The reported port of registry changed: Monrovia (2018–2019), then Willemstad (2020–2021), then Nassau (2023–2025).

Its 8,031 t of CO₂ for 2025 is 1.5 times the median of 5,190 t among the 111 refrigerated cargo carriers on this register that reported for 2025. Per nautical mile it emitted 193.3 kg CO₂, 26% below the type median of 260.9 kg. It logged 4,551 hours at sea against a median of 1,731 hours for its type that year. 2.4% of its 2025 emissions were at berth; the median for refrigerated cargo carriers was 3.8%. Across 7 years with reported emissions, the highest was 2025 (8,031 t) and the lowest 2023 (2,168 t). Its efficiency percentile within the type went from 74 in 2018 to 64 in 2025 (lower is more efficient). Of the 5 comparable vessels listed below with a 2025 return, 4 reported a lower CO₂ per nautical mile than this vessel.

Emissions by year2018–2025

Vessel particulars

IMO number

9127928

Ship type

Refrigerated cargo carrier

Gross tonnage

5,918

Length overall

134.0 m

Beam

15.0 m

Year built

1996

Flag state

Bahamas per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Curaçao. The flag shown is from the newest official source, the EU MRV return for 2025.

Port of registry

Nassau MRV 2025

Home port

Nassau

Technical efficiency (design)

EEXI (21.6 gCO₂/t·nm)

Verifier

Bureau Veritas Certification France, France

Accreditation

3-2047 rev. 4

Compliance document issued

2026-03-23

Compliance document expires

2027-06-30

Efficiency against its own type2025

Position 61 of 95 qualifying refrigerated cargo carriers by EEOI, at the 64th percentile. The dashed line is the type median, 55.3; this vessel reported 60.6.

EEOI divides emissions by transport work, which for this vessel and year was 132,440,963 tonne-miles over 41,557 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 22.4% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2022, so the series has gaps.

From 2024 to 2025, emissions rose 34.9% while distance sailed rose 47.1%and CO₂ per nautical mile fell 8.3%.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

8,157 t

Methane (CH₄)

0.13 t

Nitrous oxide (N₂O)

0.46 t

Under EU ETS

4,113 t, 51% of total

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

• NOVA FLORIDA 1989 · 5,476 GT · 658 t · 147.9 kg/nm
• ORANGE STREAM 2019 · 5,950 GT · 2,050 t · 155.4 kg/nm
• COOL EXPRESO 1994 · 5,471 GT · 1,098 t · 217.4 kg/nm
• ORANGE STRAIT 2019 · 6,088 GT · 2,949 t · 132.7 kg/nm
• SILVER DANIA 1989 · 5,167 GT · 4,441 t · 123.8 kg/nm
• SAVANNA BREEZE 2019 · 6,300 GT · 1,883 t · 184.2 kg/nm
• GREEN MAVERIC 1993 · 5,103 GT · 3,641 t · 165.9 kg/nm
• SAVANNA WIND 2020 · 6,300 GT · 1,582 t · 194.7 kg/nm