Navalyze · General cargo · Ship

OPTIMANA

IMO: 9253856
Type: General cargo ship
Flag (estimated): Isle of Man
Port of registry: Douglas
Technical efficiency: EEXI 6.06 g CO₂/t·nm

ISM company (DoC holder) in 2025: Westfal-Larsen Management

Report year

2021 at a glance

From the 2021 THETIS-MRV report.

Fuel kg/nm

121

General cargo median 55.9 kg/nm (+117%)

CO₂ per transport work (dwt)

12.2

g CO₂/dwt·nm · General cargo median 22.7 (−46%)

Average speed

11.9 kn

General cargo median 10.9 kn (+9%)

Fuel per day at sea

34.6 t/day

Fuel consumed

4,146 t

CO₂ emitted

12,938 t

Distance sailed

34,223 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,874 h

120 days, 33% of the year

Within the general cargo fleet, 2025

Set against all 2,723 general cargo 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 90.4 kg/nm · median 35.2 (+157%)

17.4Ranks 2,606 of 2,723, lowest first78.8

Average speedThis ship 10.9 kn · median 9.3 (+17%)

6.9Faster than 78% of general cargo ships12.0

CO₂ per transport work (dwt)This ship 9.60 g CO₂/dwt·nm · median 25.5 (−62%)

10.2Ranks 237 of 2,723, lowest first52.7

Middle 80% of shipsMiddle 50%General cargo medianThis ship

Where the emissions happen, 2021

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 ports8%
From the EU27%
Into the EU62%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

304 t

2.4% 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 General cargo median is the middle ship of all general cargo ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

OPTIMANA
General cargo median

25.050.075.0100.0125.0

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

Average speed, kn

OPTIMANA
General cargo median

9.010.011.012.013.0

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

CO₂ per transport work (dwt), g CO₂/dwt·nm

OPTIMANA
General cargo median

5.010.015.020.025.030.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+0.4 kn	−8%	−5%	+45%	+19%	0.4 kn faster, fuel per mile down 8%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.2 kn	−2%	−3%	+5%	−35%	Same speed, fuel per mile down 2%; in line with the speed change.
2022→2023	−2.0 kn	−5%	−20%	+113%	+7%	2.0 kn slower, fuel per mile down 5%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.8 kn	−12%	−7%	−82%	−4%	0.8 kn faster, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.1 kn	+12%	+13%	+106%	+19%	Same speed, fuel per mile up 12%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+1.6 kn	+6%	+22%	−8%	−30%	1.6 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine or trade).
2018→2019	−1.4 kn	+3%	−9%	−39%	+33%	1.4 kn slower, fuel per mile up 3%; 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
2025	Westfal-Larsen Management	1,775	5,556	19,639	1,802	10.9	90.4	–	–
2024	Westfal-Larsen Management AS	1,332	4,217	13,557	1,286	10.5	98.2	–	–
2023	not published	1,292	4,056	12,870	1,204	10.7	100	–	–
2022	not published	641	2,003	6,042	478	12.7	106	–	–
2021	not published	4,146	12,938	34,223	2,874	11.9	121	–	–
2020	not published	1,792	5,597	16,608	1,406	11.8	108	–	–
2019	not published	1,829	5,729	17,960	1,752	10.2	102	–	–
2018	not published	2,946	9,199	29,628	2,551	11.6	99.4	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/dwt·nm	General cargo median	vs General cargo	Rank	Verifier	Methods
2025	Westfal-Larsen Management	9.60	25.5	−62%	237 of 2,723	DNV	B+C
2024	Westfal-Larsen Management AS	8.08	19.3	−58%	142 of 1,111	DNV	B
2023	not published	12.5	20.7	−40%	257 of 1,045	DNV	B
2022	not published	11.7	21.6	−46%	178 of 1,034	DNV	B
2021	not published	12.2	22.7	−46%	150 of 1,142	DNV	B
2020	not published	10.2	24.5	−58%	97 of 1,167	DNV	B
2019	not published	14.7	25.0	−41%	178 of 1,154	DNV	B
2018	not published	11.1	24.9	−55%	120 of 1,044	DNV	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. General cargo ships are benchmarked on CO₂ per transport work (dwt) (TW), in g CO₂/dwt·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 general cargo 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.