Navalyze · LNG carrier · Ship

FLEX RAINBOW

IMO: 9709037
Type: LNG carrier
Flag (estimated): Marshall Islands
Port of registry: Majuro
Technical efficiency: EEXI 3.24 g CO₂/t·nm
Fuel (estimated): Mostly LNG

ISM company (DoC holder) in 2025: Flex LNG Fleet Management AS

Report year

2022 at a glance

From the 2022 THETIS-MRV report.

Fuel kg/nm

270

LNG carrier median 252 kg/nm (+7%)

CO₂ per transport work (volume)

8.52

g CO₂/m³·nm · LNG carrier median 10.4 (−18%)

Average speed

14.1 kn

LNG carrier median 14.1 kn (+0%)

Fuel per day at sea

91.3 t/day

Fuel consumed

19,445 t

CO₂ emitted

54,972 t

Distance sailed

72,146 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,112 h

213 days, 58% of the year

Within the LNG carrier fleet, 2025

Set against all 386 LNG carrier 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 230 kg/nm · median 190 (+21%)

152Ranks 275 of 386, lowest first319

Average speedThis ship 13.6 kn · median 14.4 (−6%)

11.2Faster than 32% of LNG carrier ships15.9

CO₂ per transport work (volume)This ship 7.30 g CO₂/m³·nm · median 7.12 (+3%)

5.06Ranks 201 of 386, lowest first16.1

Middle 80% of shipsMiddle 50%LNG carrier medianThis ship

Where the emissions happen, 2022

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 ports9%
From the EU47%
Into the EU39%
At berth in the EU5%

Fuel burned laden

–

Not reported

CO₂ at berth

2,881 t

5.2% 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 LNG carrier median is the middle ship of all LNG carrier ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

FLEX RAINBOW
LNG carrier median

0.0100.0200.0300.0400.0

’182018’192019’202020’212021’222022’232023’252025

Average speed, kn

FLEX RAINBOW
LNG carrier median

10.012.014.016.0

’182018’192019’202020’212021’222022’232023’252025

CO₂ per transport work (volume), g CO₂/m³·nm

FLEX RAINBOW
LNG carrier median

4.06.08.010.012.0

’192019’202020’212021’222022’232023’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2023→2025	−1.8 kn	−6%	−17%	−19%	+21%	1.8 kn slower, fuel per mile down 6%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+1.3 kn	−10%	−1%	−63%	−29%	1.3 kn faster, fuel per mile down 10%; better than speed alone explains (hull, engine or trade).
2021→2022	−1.8 kn	+76%	+56%	+498%	+69%	1.8 kn slower, fuel per mile up 76%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.1 kn	−15%	−15%	−50%	−23%	Same speed, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2019→2020	+3.9 kn	−7%	+24%	−60%	+23%	3.9 kn faster, fuel per mile down 7%; better than speed alone explains (hull, engine or trade).
2018→2019	+1.3 kn	+241%	+286%	+58%	–	1.3 kn faster, fuel per mile up 241%; 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
2025LNG	Flex LNG Fleet Management AS	4,995	13,992	21,741	1,596	13.6	230	–	–
2023LNG / alt.	not published	6,519	18,034	26,781	1,734	15.4	243	–	–
2022LNG / alt.	not published	19,445	54,972	72,146	5,112	14.1	270	–	–
2021LNG / alt.	not published	1,844	5,157	12,058	758	15.9	153	–	–
2020LNG / alt.	not published	4,378	12,205	24,227	1,530	15.8	181	–	–
2019LNG / alt.	not published	11,863	33,514	61,188	5,122	11.9	194	–	–
2018	not published	2,194	6,857	38,658	3,652	10.6	56.8	1.37	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/m³·nm	LNG carrier median	vs LNG carrier	Rank	Verifier	Methods
2025LNG	Flex LNG Fleet Management AS	7.30	7.12	+3%	201 of 386	DNV	A+B+C
2023LNG / alt.	not published	6.05	9.10	−34%	60 of 355	DNV	A+B+C
2022LNG / alt.	not published	8.52	10.4	−18%	141 of 379	DNV	C
2021LNG / alt.	not published	5.03	10.5	−52%	18 of 289	DNV	C
2020LNG / alt.	not published	6.50	10.7	−39%	24 of 267	DNV	B+C
2019LNG / alt.	not published	5.28	10.9	−51%	10 of 248	DNV	B+C
2018	not published	–	–	–	–	DNV	B+C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. LNG carrier ships are benchmarked on CO₂ per transport work (volume) (TW), in g CO₂/m³·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 LNG carrier 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.