Navalyze · Oil tanker · Ship

RAINBOW SPIRIT

IMO: 9837171
Type: Oil tanker
Average cargo carried: 40,434 t
Flag (estimated): Bahamas
Port of registry: Nassau

ISM company (DoC holder) in 2025: Maran Shuttle Tankers Norway AS · part of Maran

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 33,596 t of cargo on average.

Fuel kg/nm

201

Oil tanker median 129 kg/nm (+55%)

CO₂ per transport work (cargo)

17.8

g CO₂/t·nm · Oil tanker median 8.44 (+111%)

Average speed

7.0 kn

Oil tanker median 11.0 kn (−36%)

Fuel per day at sea

33.9 t/day

Fuel consumed

8,128 t

CO₂ emitted

24,268 t

Distance sailed

40,490 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,748 h

240 days, 66% of the year

Within the oil tanker fleet, 2025

Set against all 1,665 oil tanker ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel kg/nmThis ship 226 kg/nm · median 129 (+76%)

76.1Ranks 1,598 of 1,665, lowest first191

Average speedThis ship 7.0 kn · median 10.7 (−35%)

8.0Faster than 5% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 17.0 g CO₂/t·nm · median 7.95 (+113%)

4.51Ranks 1,335 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2023

THETIS splits each ship's CO₂ by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

Between EU ports70%
From the EU9%
Into the EU11%
At berth in the EU11%

Fuel burned laden

–

Not reported

CO₂ at berth

2,589 t

10.7% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

–

CO₂eq on top of CO₂ alone, from CH₄ and N₂O

Over the years

Full-year reports only. The Oil tanker median is the middle ship of all oil tanker ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

RAINBOW SPIRIT
Oil tanker median

125.0150.0175.0200.0225.0250.0

’202020’212021’222022’232023’242024’252025

Average speed, kn

RAINBOW SPIRIT
Oil tanker median

6.08.010.012.0

’202020’212021’222022’232023’242024’252025

CO₂ per transport work (cargo), g CO₂/t·nm

RAINBOW SPIRIT
Oil tanker median

7.510.012.515.017.520.0

’202020’212021’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.5 kn	+7%	+0%	+30%	+3%	0.5 kn slower, fuel per mile up 7%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+0.5 kn	+5%	+12%	−28%	−8%	0.5 kn faster, fuel per mile up 5%; better than speed alone explains (hull, engine or trade).
2022→2023	+0.0 kn	+2%	+3%	−7%	+6%	Same speed, fuel per mile up 2%; in line with the speed change.
2021→2022	+0.6 kn	−2%	+6%	+4%	+14%	0.6 kn faster, fuel per mile down 2%; better than speed alone explains (hull, engine or trade).
2020→2021	−0.7 kn	+10%	−1%	+39%	+20%	0.7 kn slower, fuel per mile up 10%; worse than speed alone explains (fouling, weather, loading or trade).

Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

Year	ISM company	Fuel t	CO₂ t	Distance nm	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	Maran Shuttle Tankers Norway AS	8,543	25,979	37,860	5,416	7.0	226	17.0	–
2024LNG	Altera Infrastructure Norway AS	6,153	17,915	29,164	3,896	7.5	211	16.5	–
2023	not published	8,128	24,268	40,490	5,748	7.0	201	17.8	–
2022	not published	8,600	26,705	43,730	6,277	7.0	197	16.8	–
2021LNG / alt.	not published	8,468	24,377	42,025	6,571	6.4	202	14.8	–
2020LNG / alt.	not published	5,528	16,071	30,289	4,249	7.1	183	12.3	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Maran Shuttle Tankers Norway AS	17.0	7.95	+113%	1,335 of 1,665	DNV	B+C
2024LNG	Altera Infrastructure Norway AS	16.5	8.06	+104%	1,462 of 1,787	DNV	B+C
2023	not published	17.8	8.44	+111%	1,497 of 1,797	DNV	B+C
2022	not published	16.8	8.51	+98%	1,606 of 1,961	DNV	B+C
2021LNG / alt.	not published	14.8	8.86	+67%	1,363 of 1,789	DNV	B+C
2020LNG / alt.	not published	12.3	9.03	+36%	1,273 of 1,870	DNV	B+C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Oil tanker ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·nm. CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's oil tanker ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.