Navalyze · Oil tanker · Ship

WONDER MIMOSA

IMO: 9312901
Type: Oil tanker
Average cargo carried: 13,823 t
Flag (estimated): Marshall Islands
Port of registry: Majuro
Technical efficiency: EEXI 5.69 g CO₂/t·nm
Ice class: IA
Former names: SIKINOS

ISM company (DoC holder) in 2025: CASTOR SHIPS S.A.

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 13,823 t of cargo on average.

Fuel kg/nm

133

Oil tanker median 129 kg/nm (+4%)

CO₂ per transport work (cargo)

30.3

g CO₂/t·nm · Oil tanker median 7.95 (+282%)

Average speed

4.9 kn

Oil tanker median 10.7 kn (−54%)

Fuel per day at sea

15.6 t/day

Fuel consumed

4,018 t

CO₂ emitted

12,647 t

12,844 t CO₂eq incl. CH₄ and N₂O

Distance sailed

30,165 nm

CO₂ ÷ CO₂ per mile

Time at sea

6,175 h

257 days, 70% of the year

Within the oil tanker fleet, 2025

Set against all 1,665 oil tanker 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 133 kg/nm · median 129 (+4%)

76.1Ranks 927 of 1,665, lowest first191

Average speedThis ship 4.9 kn · median 10.7 (−54%)

8.0Faster than 1% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 30.3 g CO₂/t·nm · median 7.95 (+282%)

4.51Ranks 1,523 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2025

THETIS splits each ship's emissions 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 ports42%
From the EU22%
Into the EU25%
At berth in the EU11%

78% of this ship's CO₂ falls under the EU ETS (9,839 t).

Fuel burned laden

–

Not reported

CO₂ at berth

1,372 t

10.9% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.2 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+197 t

+1.6% CO₂eq on top of CO₂ alone, from CH₄ and N₂O; counted in full from 2026

Over the years

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

Fuel kg/nm

WONDER MIMOSA
Oil tanker median

80.0100.0120.0140.0

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

Average speed, kn

WONDER MIMOSA
Oil tanker median

4.06.08.010.012.014.0

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

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

WONDER MIMOSA
Oil tanker median

0.010.020.030.040.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−2.3 kn	−1%	−34%	+19%	+5%	2.3 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2022→2024	−4.0 kn	+24%	−20%	−11%	+52%	4.0 kn slower, fuel per mile up 24%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.9 kn	+0%	−7%	+67%	−12%	0.9 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.9 kn	−17%	−11%	+9%	−22%	0.9 kn faster, fuel per mile down 17%; better than speed alone explains (hull, engine or trade).
2019→2020	+3.4 kn	+15%	+65%	−65%	+61%	3.4 kn faster, fuel per mile up 15%; better than speed alone explains (hull, engine or trade).
2018→2019	+1.7 kn	−4%	+22%	+57%	−22%	1.7 kn faster, fuel per mile down 4%; 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	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	CASTOR SHIPS S.A.	4,018	12,647	30,165	6,175	4.9	133	30.3	–
2024	CASTOR SHIPS S.A.	3,432	10,811	25,386	3,502	7.2	135	28.9	–
2022	not published	3,114	9,893	28,526	2,539	11.2	109	19.1	–
2021	not published	1,858	5,857	17,085	1,415	12.1	109	21.8	–
2020	not published	2,046	6,532	15,636	1,394	11.2	131	28.0	–
2019	not published	5,093	16,091	44,803	5,743	7.8	114	17.4	–
2018	not published	3,372	10,605	28,492	4,651	6.1	118	22.2	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	CASTOR SHIPS S.A.	30.3	7.95	+282%	1,523 of 1,665	Bureau Veritas	A
2024	CASTOR SHIPS S.A.	28.9	8.06	+259%	1,646 of 1,787	Bureau Veritas	A
2022	not published	19.1	16.1	+19%	837 of 1,409	Lloyd's Register	A
2021	not published	21.8	16.7	+31%	908 of 1,343	Lloyd's Register	A
2020	not published	28.0	16.2	+73%	1,029 of 1,312	Lloyd's Register	–
2019	not published	17.4	17.3	+0%	664 of 1,321	Lloyd's Register	–
2018	not published	22.2	17.1	+29%	875 of 1,294	Lloyd's Register	–

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Oil tanker 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 oil tanker 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.