Navalyze · Reefer · Ship

STAR SPIRIT

IMO: 9765847
Type: Refrigerated cargo carrier
Average cargo carried: 6,738 t
Port of registry: Panama
Technical efficiency: EIV 29.03 g CO₂/t·nm
Ice class: IB

ISM company (DoC holder) in 2025: Kowa Marine Service Co., Ltd.

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 6,738 t of cargo on average.

Fuel per mile

133.4 kg/nm

Reefer median 82.9 kg/nm (+61%)

CO₂ per transport work (cargo)

61.74

g CO₂/t·nm · Reefer median 56.80 (+9%)

Average speed

16.0 kn

Reefer median 14.6 kn (+10%)

Fuel per day at sea

51.3 t/day

Fuel consumed

5,049 t

CO₂ emitted

15,740 t

15,988 t CO₂eq incl. CH₄ and N₂O

Distance sailed

37,838 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,360 h

98 days, 27% of the year

Within the reefer fleet, 2025

Set against all 109 reefer 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 per mileThis ship 133.4 kg/nm · median 82.9 (+61%)

55.8Ranks 103 of 109, lowest first117.7

Average speedThis ship 16.0 kn · median 14.6 (+10%)

8.2Faster than 77% of reefer ships16.7

CO₂ per transport work (cargo)This ship 61.74 g CO₂/t·nm · median 56.80 (+9%)

36.74Ranks 65 of 109, lowest first140.03

Middle 80% of shipsMiddle 50%Reefer medianThis ship

Where the emissions happen, 2025

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 ports10%
From the EU46%
Into the EU43%
At berth in the EU0%

0% of this ship's CO₂ falls under the EU ETS (0 t).

Fuel burned laden

–

Not reported

CO₂ at berth

0.0%

Alongside in EU ports

Methane (CH₄)

0.3 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

Uplift from CH₄ and N₂O, counted in full from 2026

Over the years

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

Fuel per mile, kg/nm

STAR SPIRIT
Reefer median

80.0100.0120.0140.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

STAR SPIRIT
Reefer median

14.015.016.017.018.0

’182018’192019’202020’212021’222022’232023’242024’252025

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

STAR SPIRIT
Reefer median

30.040.050.060.070.080.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	−0.7 kn	−2%	−6%	−64%	–	0.7 kn slower, fuel per mile down 2%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.3 kn	+14%	+12%	+4%	–	0.3 kn slower, fuel per mile up 14%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−0.1 kn	−0%	−1%	+67%	−1%	Same speed, fuel per mile flat.
2021→2022	+0.4 kn	−9%	−6%	−43%	+2%	0.4 kn faster, fuel per mile down 9%; better than speed alone explains (hull, engine or trade).
2020→2021	+1.1 kn	+18%	+26%	+41%	−0%	1.1 kn faster, fuel per mile up 18%; in line with the speed change.
2019→2020	+0.0 kn	+1%	+1%	+349%	+34%	Same speed, fuel per mile flat.
2018→2019	−0.2 kn	+10%	+8%	−61%	−19%	Same speed, fuel per mile up 10%; worse than speed alone explains (fouling, weather, loading or trade).

Part-year reports are left out of these comparisons. 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025part-year	Kowa Marine Service Co., Ltd.	5,049	15,740	37,838	2,360	16.0	133.4	61.74	–
2025	SIA "Windrose Shipmanagement Ltd"	5,049	15,740	37,838	2,360	16.0	133.4	61.74	–
2024	Kowa Marine Service Co.,Ltd.	14,481	45,161	106,254	6,361	16.7	136.3	–	–
2023	not published	12,175	37,960	101,710	5,985	17.0	119.7	49.69	–
2022	not published	7,302	22,786	60,964	3,556	17.1	119.8	49.97	–
2021	not published	13,982	43,591	106,363	6,366	16.7	131.4	49.08	–
2020	not published	8,376	26,138	75,187	4,825	15.6	111.4	49.24	–
2019	not published	1,852	5,805	16,755	1,075	15.6	110.5	36.74	–
2018	not published	4,371	13,715	43,351	2,744	15.8	100.8	45.46	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Reefer median	vs Reefer	Rank	Verifier	Methods
2025part-year	Kowa Marine Service Co., Ltd.	–	–	–	–	ClassNK	C
2025	SIA "Windrose Shipmanagement Ltd"	61.74	56.80	+9%	65 of 109	ClassNK	–
2024	Kowa Marine Service Co.,Ltd.	–	–	–	–	ClassNK	C
2023	not published	49.69	55.59	−11%	53 of 135	ClassNK	C
2022	not published	49.97	55.27	−10%	59 of 143	ClassNK	C
2021	not published	49.08	54.99	−11%	57 of 158	ClassNK	A+C
2020	not published	49.24	59.07	−17%	41 of 149	ClassNK	A+C
2019	not published	36.74	62.58	−41%	17 of 147	ClassNK	A+C
2018	not published	45.46	72.84	−38%	23 of 136	ClassNK	A+B+C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Reefer 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 reefer 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.