Oil tanker · Bahamas flag · built 2020

RAINBOW SPIRIT: CO₂ emissions 2020–2025

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 against its type

Built in 2020, it is 10 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 90,000 gross tonnage it is larger than 86% of the other 2,841 oil tankers with a recorded tonnage. It is one of 180 oil tankers here under the Bahamas flag, 5.1% of the 3,548 on the register. The same builder is recorded for 563 other vessels here, 217 of them oil tankers. The reported port of registry changed: Stavanger (2020–2024), then Nassau (2025).

Its 25,979 t of CO₂ for 2025 is 3.3 times the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 686.2 kg CO₂, 1.7 times the type median of 403.2 kg. It logged 5,416 hours at sea against a median of 2,030 hours for its type that year. 6.3% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 6 years with reported emissions, the highest was 2022 (26,705 t) and the lowest 2020 (16,071 t). Its efficiency percentile within the type went from 72 in 2020 to 89 in 2025 (lower is more efficient). Of the 6 sister ships listed below with a 2025 return, 6 reported a lower CO₂ per nautical mile than this vessel.

Emissions by year2020–2025

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

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 per EU MRV 2025
Builder: Samsung Heavy Industries
Port of registry: Nassau MRV 2025
Verifier: DNV, Germany
Accreditation: VS-16026-01
Compliance document issued: 2026-03-12
Compliance document expires: 2027-06-30

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 tonne-miles over 37,860 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 61.7% higher than in 2020, for EU/EEA voyages only.

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.

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: 10.7 kn

Its recorded positions span 58.0°N to 71.0°N and 4.4°E to 18.4°E.

400 hourly points from 3,929 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.

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.

This page draws on 6 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, AIS movements in Norwegian waters and a licensed photograph. Not found in the sources for this vessel: a name history, 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.