Navalyze · LNG carrier · Ship

FLEX VIGILANT

IMO: 9862475
Type: LNG carrier
Flag (estimated): Marshall Islands
Port of registry: Majuro
Technical efficiency: EEXI 4.72 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

197

LNG carrier median 252 kg/nm (−22%)

CO₂ per transport work (volume)

6.73

g CO₂/m³·nm · LNG carrier median 10.4 (−35%)

Average speed

12.2 kn

LNG carrier median 14.1 kn (−13%)

Fuel per day at sea

57.7 t/day

Fuel consumed

10,990 t

CO₂ emitted

31,594 t

Distance sailed

55,695 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,574 h

191 days, 52% 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 171 kg/nm · median 190 (−10%)

152Ranks 108 of 386, lowest first319

Average speedThis ship 14.6 kn · median 14.4 (+1%)

11.2Faster than 53% of LNG carrier ships15.9

CO₂ per transport work (volume)This ship 5.61 g CO₂/m³·nm · median 7.12 (−21%)

5.06Ranks 99 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 ports0%
From the EU49%
Into the EU49%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

528 t

1.7% 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 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 VIGILANT
LNG carrier median

150.0200.0250.0300.0

’212021’222022’232023’242024’252025

Average speed, kn

FLEX VIGILANT
LNG carrier median

11.012.013.014.015.0

’212021’222022’232023’242024’252025

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

FLEX VIGILANT
LNG carrier median

5.07.510.012.515.0

’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	+3.1 kn	+12%	+41%	+118%	−60%	3.1 kn faster, fuel per mile up 12%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.6 kn	−19%	−23%	+44%	+4%	0.6 kn slower, fuel per mile down 19%; better than speed alone explains (hull, engine or trade).
2022→2023	−0.1 kn	−4%	−5%	−50%	+98%	Same speed, fuel per mile down 4%; in line with the speed change.
2021→2022	−2.5 kn	+19%	−2%	+61%	+14%	2.5 kn slower, fuel per mile up 19%; 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	14,904	40,477	87,293	5,999	14.6	171	–	–
2024LNG	Flex LNG Fleet Management AS	6,115	16,479	39,958	3,478	11.5	153	–	–
2023LNG / alt.	not published	5,272	15,024	27,795	2,298	12.1	190	–	–
2022LNG / alt.	not published	10,990	31,594	55,695	4,574	12.2	197	–	–
2021LNG / alt.	not published	5,761	16,249	34,699	2,358	14.7	166	–	–

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	5.61	7.12	−21%	99 of 386	DNV	B+C
2024LNG	Flex LNG Fleet Management AS	13.9	7.39	+88%	270 of 312	DNV	A+B+C
2023LNG / alt.	not published	13.4	9.10	+47%	289 of 355	DNV	A+B+C
2022LNG / alt.	not published	6.73	10.4	−35%	77 of 379	DNV	A+C
2021LNG / alt.	not published	5.90	10.5	−44%	35 of 289	DNV	A+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.