HW OTTO: CO₂ emissions 2018–2025

HW OTTO against its type

Built in 2007, it is 3 years older than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 25,864 gross tonnage it is larger than 61% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 402 chemical tankers here under the Liberia flag, 17.2% of the 2,344 on the register. The same builder is recorded for 21 other vessels here, 5 of them chemical tankers. Its MRV returns name it NORIENT SATURN for 2018–2022 and HW OTTO for 2023–2025. The returns for 2018–2025 all give Monrovia as port of registry.

Its 3,899 t of CO₂ for 2024 is 33% below the median of 5,830 t among the 1,451 chemical tankers on this register that reported for 2024. Per nautical mile it emitted 295.7 kg CO₂, 17% above the type median of 253.5 kg. It logged 1,347 hours at sea against a median of 2,177 hours for its type that year. 1.8% of its 2024 emissions were at berth; the median for chemical tankers was 5.9%. Across 7 years with reported emissions, the highest was 2022 (13,461 t) and the lowest 2018 (2,112 t). Its efficiency percentile within the type went from 69 in 2018 to 32 in 2024 (lower is more efficient). The one comparable vessel listed below with a 2024 return reported a higher or equal CO₂ per nautical mile.

No EU/EEA voyages were reported for 2025: zero CO₂ and zero time at sea, left out of the trend and of any ranking.

Emissions by year2018–2025

Vessel particulars

IMO number

9394040

Previously reported as

NORIENT SATURN

Ship type

Chemical tanker

Gross tonnage

25,864

Length overall

180.0 m

Beam

32.2 m

Year built

2007

Flag state

Liberia per EU MRV 2025

Builder

Constanța Shipyard

Port of registry

Monrovia MRV 2024

Home port

Monrovia

Technical efficiency (design)

EIV (7.08 gCO₂/t·nm)

Verifier

HELLENIC LLOYD'S S.A., Greece

Accreditation

1190

Compliance document issued

2025-03-12

Compliance document expires

2026-06-30

Efficiency against its own type2024

Position 385 of 1,194 qualifying chemical tankers by EEOI, at the 32nd percentile. The dashed line is the type median, 15.9; this vessel reported 11.8.

EEOI divides emissions by transport work, which for this vessel and year was 329,312,500 tonne-miles over 13,184 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2024 was 84.6% higher than in 2018, for EU/EEA voyages only.

From 2023 to 2024, emissions rose 56.9% while distance sailed rose 79.0%and CO₂ per nautical mile fell 12.4%.That points mainly to how much the vessel sailed, rather than the other.

Where the 2024 emissions occurred

Methane, nitrous oxide and EU ETS2024

Total CO₂ equivalent

3,960 t

Methane (CH₄)

0.06 t

Nitrous oxide (N₂O)

0.22 t

Under EU ETS

2,085 t, 53% 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 8 MRV reporting years, an efficiency ranking, 5 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

• ARS ET LABOUR sister · 2008 · 25,864 GT · 12,411 t · 365.2 kg/nm
• ICHESIA M sister · 2009 · 25,864 GT · 13,114 t · 371.4 kg/nm
• ALLEGRA sister · 2009 · 25,864 GT · 11,389 t · 368.1 kg/nm
• AMIF sister · 2008 · 46,820 GT · 3,691 t · 288.2 kg/nm
• STOLT ISLAND 2009 · 25,834 GT · 12,051 t · 356.7 kg/nm
• HARALD MAERSK 2009 · 25,709 GT · 6,080 t · 329.0 kg/nm
• ALICE 2006 · 25,651 GT · 2,407 t · 532.2 kg/nm
• ZAGARA 2002 · 25,651 GT · 7,849 t · 346.9 kg/nm