Navalyze · LNG carrier · Ship

COOL DISCOVERER

IMO: 9861031
Type: LNG carrier
Flag (estimated): Malta
Port of registry: Valletta
Technical efficiency: EEDI 5.83 g CO₂/t·nm
Fuel (estimated): Mostly LNG

ISM company (DoC holder) in 2025: Thenamaris LNG Inc · part of Thenamaris

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel kg/nm

182

LNG carrier median 231 kg/nm (−21%)

CO₂ per transport work (volume)

6.99

g CO₂/m³·nm · LNG carrier median 9.10 (−23%)

Average speed

14.1 kn

LNG carrier median 14.2 kn (−1%)

Fuel per day at sea

61.6 t/day

Fuel consumed

15,333 t

CO₂ emitted

43,597 t

Distance sailed

84,432 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,976 h

249 days, 68% 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 154 kg/nm · median 190 (−19%)

152Ranks 42 of 386, lowest first319

Average speedThis ship 13.5 kn · median 14.4 (−6%)

11.2Faster than 29% of LNG carrier ships15.9

CO₂ per transport work (volume)This ship 5.22 g CO₂/m³·nm · median 7.12 (−27%)

5.06Ranks 54 of 386, lowest first16.1

Middle 80% of shipsMiddle 50%LNG carrier 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 ports0%
From the EU55%
Into the EU43%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

741 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

COOL DISCOVERER
LNG carrier median

150.0200.0250.0300.0

’212021’222022’232023’242024’252025

Average speed, kn

COOL DISCOVERER
LNG carrier median

13.514.014.515.015.5

’212021’222022’232023’242024’252025

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

COOL DISCOVERER
LNG carrier median

4.06.08.010.012.0

’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	+0.0 kn	−2%	−2%	+50%	−1%	Same speed, fuel per mile flat.
2023→2024	−0.6 kn	−14%	−18%	−15%	−24%	0.6 kn slower, fuel per mile down 14%; better than speed alone explains (hull, engine or trade).
2022→2023	−0.1 kn	+3%	+3%	−18%	+6%	Same speed, fuel per mile up 3%; in line with the speed change.
2021→2022	−1.0 kn	+2%	−4%	+54%	+24%	1.0 kn slower, fuel per mile flat; 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	Thenamaris LNG Inc	16,518	45,042	107,144	7,965	13.5	154	–	–
2024LNG	Thenamaris LNG Inc	11,218	30,431	71,542	5,308	13.5	157	–	–
2023LNG / alt.	not published	15,333	43,597	84,432	5,976	14.1	182	–	–
2022LNG / alt.	not published	18,015	51,137	102,659	7,208	14.2	176	–	–
2021LNG / alt.	not published	11,437	32,298	66,449	4,381	15.2	172	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/m³·nm	LNG carrier median	vs LNG carrier	Rank	Verifier	Methods
2025LNG	Thenamaris LNG Inc	5.22	7.12	−27%	54 of 386	RINA	B+C
2024LNG	Thenamaris LNG Inc	5.29	7.39	−28%	66 of 312	RINA	B+C
2023LNG / alt.	not published	6.99	9.10	−23%	108 of 355	RINA	B+C
2022LNG / alt.	not published	6.61	10.4	−36%	66 of 379	RINA	B+C
2021LNG / alt.	not published	5.32	10.5	−49%	23 of 289	RINA	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.