Oil tanker · Bahamas flag · built 2020

RAINBOW SPIRIT

IMO 9837171 MMSI 311001591EU ETS6 reporting years

CO₂ reported 2025: 25,979 t
Fuel burned: 8,543 t
Distance: 37,860 nm
Time at sea: 5,416 h
Emitted at berth: 6% of total
Share of year under way: 62%
Gross tonnage: 90,000

RAINBOW SPIRIT — kees torn, CC BY-SA 2.0 · File

Vessel particulars

IMO number: 9837171
MMSI: 311001591
Call sign: C6HX2
Ship type: Oil tanker
Gross tonnage: 90,000
Length overall: 277.0 m
Beam: 46.0 m
Year built: 2020
Flag state: Bahamas
Builder: Samsung Heavy Industries
Port of registry: Nassau
Verifier: DNV, Germany
Accreditation: VS-16026-01
Compliance document issued: 2026-03-12
Compliance document expires: 2027-06-30

Flag state is derived from rapportert, not reported directly, and reflects the registry at the time of reporting.

Efficiency against its own type2025

Position 1,283 of 1,448 qualifying oil tankers by EEOI, at the 89th percentile. The dashed line is the type median, 7.5; this vessel reported 17.0.

EEOI divides emissions by transport work, which for this vessel and year was 1,530,852,092 tonn-nmover 37,860 nautical miles.

Reported CO₂ by year

Between 2020 and 2025 reported CO₂ rose by 61.7%.

From 2024 to 2025, emissions rose 45.0% while distance sailed rose 29.8%and CO₂ per nautical mile rose 11.7%.That points mainly to how much the vessel sailed, rather than the other.

Annual returns2020–2025

Year	CO₂ (t)	Fuel (t)	Distance (nm)	At sea (h)	At berth (t)	kg CO₂/nm	EEOI	Percentile
2025	25,979	8,543	37,860	5,416	1,641	686.2	17.0	89
2024	17,915	6,153	29,164	3,896	1,638	614.3	16.5	89
2023	24,268	8,128	40,490	5,748	2,588	599.4	17.8	89
2022	26,705	8,600	43,730	6,277	2,115	610.7	16.8	88
2021	24,377	8,468	42,025	6,571	3,386	580.1	14.8	82
2020	16,071	5,528	30,289	4,249	1,907	530.6	12.3	72

Where the 2025 emissions occurred

Methane, nitrous oxide and EU ETS2025

Total CO₂ equivalent: 28,344 t
Methane (CH₄): 71.55 t
Nitrous oxide (N₂O): 1.37 t
Under EU ETS: 16,639 t, 64% of total

Observed movementsAIS · Norwegian waters

First seen: 27 Jul 2025
Last seen: 26 Jul 2026
Days observed: 69
Positions: 3,929
Median speed: 10.5 kn

400 points sampled hourly from 3,929 recorded positions. The filled circle is the first observed position, the open one the last. Named squares are ports, shown for orientation; they are not recorded calls.

Positions recorded per month

Norwegian waters only, 01 Jul 2025 to 27 Jul 2026. A gap here means the vessel was not recorded in that area. It is not evidence that the vessel was idle, and not evidence that a transponder was switched off. Voyages elsewhere are outside this dataset.

Sources and how to read this

Emissions: EU MRV publication (THETIS-MRV), reporting years 2020–2025, published by the European Commission.
Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
Movements: Norwegian Coastal Administration open AIS extract.

What this page is built on

Reporting years: 6
Ranked by efficiency: yes
Vessel particulars: 5 of 5
Movement data: yes
Name history: none recorded
Photograph: yes
Sanctions record: none
Inspection record: none in US waters

Caveats that apply to every vessel page

EEOI above 100,000 is withheld. Those values come from returns where reported transport work is near zero, which makes the ratio meaningless rather than extreme. Median across the dataset is around 12.

Emission categories overlap. In the MRV return, emissions at berth are also counted inside the voyage legs, so the categories do not sum to the total. They are shown side by side rather than stacked for that reason.

Distance is derived, intensity is reported. The MRV return publishes CO₂ per nautical mile but not the distance itself, which is null in all 106,564 rows of the source. The distance column is therefore filled from the ranking step, which reconstructs it, and is blank for years where a vessel was not ranked. That is why a row can show an intensity without a distance.

Percentile is within type and year. It is the vessel's position among qualifying ships of the same type that year, where lower is more efficient. A blank means the vessel did not qualify for ranking that year.

Sister ships share a builder, a type and a build year within two years of this vessel. That holds hull and machinery roughly constant and leaves operation as the variable, which is why they are listed before nearest-by-tonnage.

Methane and nitrous oxide start in 2024. They were not reported before that period, so earlier years cannot be compared against them.

Technical efficiency is a design figure fixed at construction. A vessel can hold a good index and still emit heavily by sailing fast, waiting at anchor or carrying little.

Inspection records cover United States waters only. An empty record is not evidence of a clean history elsewhere.

Empty means unreported, never zero. Nothing here is modelled, estimated or interpolated. See the methodology.

Something wrong on this page? See corrections. We do not hold the source registers and cannot amend them, but we will fix anything we have got wrong in reproducing them.