Navalyze · Reefer · Ship

COSTA RICAN STAR

IMO: 9150822
Type: Refrigerated cargo carrier
Average cargo carried: 7,070 t
Port of registry: Monrovia
Technical efficiency: EEXI 18.31 g CO₂/t·nm

ISM company (DoC holder) in 2025: SIEM Ship Management · part of Siem

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 7,070 t of cargo on average.

Fuel per mile

91.4 kg/nm

Reefer median 82.9 kg/nm (+10%)

CO₂ per transport work (cargo)

40.46

g CO₂/t·nm · Reefer median 56.80 (−29%)

Average speed

14.7 kn

Reefer median 14.6 kn (+1%)

Fuel per day at sea

32.3 t/day

Fuel consumed

3,905 t

CO₂ emitted

12,216 t

12,407 t CO₂eq incl. CH₄ and N₂O

Distance sailed

42,706 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,902 h

121 days, 33% 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 91.4 kg/nm · median 82.9 (+10%)

55.8Ranks 76 of 109, lowest first117.7

Average speedThis ship 14.7 kn · median 14.6 (+1%)

8.2Faster than 51% of reefer ships16.7

CO₂ per transport work (cargo)This ship 40.46 g CO₂/t·nm · median 56.80 (−29%)

36.74Ranks 17 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 ports0%
From the EU87%
Into the EU8%
At berth in the EU5%

51% of this ship's CO₂ falls under the EU ETS (6,283 t).

Fuel burned laden

–

Not reported

CO₂ at berth

5.0%

Alongside in EU ports

Methane (CH₄)

0.2 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

COSTA RICAN STAR
Reefer median

80.090.0100.0110.0

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

Average speed, kn

COSTA RICAN STAR
Reefer median

14.515.015.516.0

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

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

COSTA RICAN STAR
Reefer median

30.040.050.060.070.080.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	−0.7 kn	+8%	+3%	+5%	−6%	0.7 kn slower, fuel per mile up 8%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+0.3 kn	−3%	−1%	−4%	−21%	0.3 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2022→2023	−0.5 kn	−6%	−9%	+5%	+38%	0.5 kn slower, fuel per mile down 6%; in line with the speed change.
2021→2022	+0.1 kn	−1%	−0%	−9%	−9%	Same speed, fuel per mile flat.
2020→2021	+0.1 kn	+4%	+5%	−31%	+9%	Same speed, fuel per mile up 4%; in line with the speed change.
2019→2020	+0.3 kn	−2%	+0%	−6%	−5%	0.3 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2018→2019	+0.5 kn	−10%	−6%	−1%	−15%	0.5 kn faster, fuel per mile down 10%; better than speed alone explains (hull, engine 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	SIEM Ship Management	3,905	12,216	42,706	2,902	14.7	91.4	40.46	–
2024	SIEM Ship Management	3,456	10,829	40,764	2,653	15.4	84.8	42.90	–
2023	not published	3,718	11,661	42,463	2,819	15.1	87.6	54.13	–
2022	not published	3,784	11,863	40,577	2,599	15.6	93.2	39.11	–
2021	not published	4,203	13,172	44,676	2,878	15.5	94.1	42.79	–
2020	not published	5,855	18,281	64,832	4,214	15.4	90.3	39.25	–
2019	not published	6,310	19,712	68,682	4,544	15.1	91.9	41.14	–
2018	not published	7,052	22,076	69,385	4,755	14.6	101.6	48.65	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Reefer median	vs Reefer	Rank	Verifier	Methods
2025	SIEM Ship Management	40.46	56.80	−29%	17 of 109	DNV	A
2024	SIEM Ship Management	42.90	58.69	−27%	24 of 108	DNV	C
2023	not published	54.13	55.59	−3%	62 of 135	DNV	C
2022	not published	39.11	55.27	−29%	26 of 143	DNV	C
2021	not published	42.79	54.99	−22%	36 of 158	DNV	C
2020	not published	39.25	59.07	−34%	16 of 149	DNV	C
2019	not published	41.14	62.58	−34%	26 of 147	DNV	C
2018	not published	48.65	72.84	−33%	30 of 136	DNV	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.