Gas carrier · Liberia flag · built 2000

BERTOLLE: CO₂ emissions 2022–2025

IMO 9177545 EU ETS3 reporting years

CO₂ reported 2025: 9,731 t
Fuel burned: 3,061 t
Distance: 39,586 nm
Time at sea: 3,857 h
Emitted at berth: 3% of total
Share of year under way: 44%
Gross tonnage: 17,840

BERTOLLE against its type

Built in 2000, it is 13 years older than the median gas carrier on this register, which was built in 2013 (530 vessels with a known build year). At 17,840 gross tonnage it is smaller than 62% of the other 525 gas carriers with a recorded tonnage. It is one of 131 gas carriers here under the Liberia flag, 19.0% of the 688 on the register. The same builder is recorded for 98 other vessels here, 11 of them gas carriers. Thome Ship Management is linked to 42 vessels on this register. Its MRV returns name it NAVIGATOR ORION for 2022 and BERTOLLE for 2024–2025. The returns for 2022–2025 all give Monrovia as port of registry.

Its 9,731 t of CO₂ for 2025 is 1.6 times the median of 5,974 t among the 363 gas carriers on this register that reported for 2025. Per nautical mile it emitted 245.8 kg CO₂, close to the type median of 256.2 kg. It logged 3,857 hours at sea against a median of 1,943 hours for its type that year. 2.7% of its 2025 emissions were at berth; the median for gas carriers was 3.8%. Across 3 years with reported emissions, the highest was 2025 (9,731 t) and the lowest 2022 (2,938 t). Its efficiency percentile within the type went from 61 in 2022 to 72 in 2025 (lower is more efficient). Of the 2 sister ships listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.

Emissions by year2022–2025

Year	CO₂ (t)	Fuel (t)	Distance (nm)	At sea (h)	At berth (t)	kg CO₂/nm	EEOI	Percentile
2025	9,731	3,061	39,586	3,857	260	245.8	48.4	72
2024	3,343	1,043	13,474	1,202	83	248.1	42.7	60
2022	2,938	926	6,452	548	1,943	455.4	48.1	61

Vessel particulars

IMO number: 9177545
Previously reported as: NAVIGATOR ORION
Ship type: Gas carrier
Gross tonnage: 17,840
Length overall: 170.0 m
Beam: 24.2 m
Year built: 2000
Flag state: Liberia per EU MRV 2025
Builder: Jiangnan Shipyard
Port of registry: Monrovia MRV 2025
Technical efficiency (design): EEXI (7.95 gCO₂/t·nm)
Operator: Thome Ship Management
Verifier: DNV, Germany
Accreditation: VS-16026-01
Compliance document issued: 2026-02-18
Compliance document expires: 2027-06-30

Efficiency against its own type2025

Position 211 of 292 qualifying gas carriers by EEOI, at the 72nd percentile. The dashed line is the type median, 27.9; this vessel reported 48.4.

Across the 39 ranked vessels operated by Thome Ship Management, the median percentile is 54. This vessel is less efficient than its own fleet median.

EEOI divides emissions by transport work, which for this vessel and year was 201,097,748 tonne-miles over 39,586 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 231.2% higher than in 2022, for EU/EEA voyages only. No return is recorded for 2023, so the series has gaps.

From 2024 to 2025, emissions rose 191.1% while distance sailed rose 193.8%and CO₂ per nautical mile fell 0.9%.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: 9,881 t
Methane (CH₄): 0.15 t
Nitrous oxide (N₂O): 0.55 t
Under EU ETS: 5,132 t, 53% of total

Sources and how to read this

Emissions: EU MRV publication (THETIS-MRV), reporting years 2022–2025, published by the European Commission.
Vessel particulars: Wikidata (CC0).

This page draws on 3 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.