Navalyze · Chemical tanker · Ship

BOW OPTIMA

IMO: 9818541
Type: Chemical tanker
Port of registry: Bergen
Technical efficiency: EEXI 4.46 g CO₂/t·nm

ISM company (DoC holder) in 2025: Odfjell Management AS

Report year

2025 at a glance

From the 2025 THETIS-MRV report.

Fuel per mile

117.2 kg/nm

CO₂ per transport work (cargo)

–

g CO₂/t·nm

Average speed

13.1 kn

Fuel per day at sea

36.8 t/day

Fuel consumed

681 t

CO₂ emitted

2,140 t

2,173 t CO₂eq incl. CH₄ and N₂O

Distance sailed

5,815 nm

CO₂ ÷ CO₂ per mile

Time at sea

444 h

19 days, 5% of the year

Within the chemical tanker fleet, 2024

Set against all 1,274 chemical tanker ships with a full-year 2024 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 109.7 kg/nm · median 80.8 (+36%)

53.8Ranks 1,136 of 1,274, lowest first110.8

Average speedThis ship 12.8 kn · median 11.0 (+16%)

8.7Faster than 96% of chemical tanker ships12.5

CO₂ per transport work (cargo)This ship 8.86 g CO₂/t·nm · median 16.73 (−47%)

8.47Ranks 159 of 1,274, lowest first41.97

Middle 80% of shipsMiddle 50%Chemical tanker 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 EU95%
Into the EU0%
At berth in the EU5%

58% of this ship's CO₂ falls under the EU ETS (1,240 t).

Fuel burned laden

–

Not reported

CO₂ at berth

4.5%

Alongside in EU ports

Methane (CH₄)

0.0 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.015

Uplift from CH₄ and N₂O, counted in full from 2026

Over the years

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

Fuel per mile, kg/nm

BOW OPTIMA
Chemical tanker median

80.090.0100.0110.0120.0

’202020’212021’222022’232023’242024’252025

Average speed, kn

BOW OPTIMA
Chemical tanker median

11.012.013.014.0

’202020’212021’222022’232023’242024’252025

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

BOW OPTIMA
Chemical tanker median

8.010.012.014.016.018.0

’202020’212021’222022’232023’242024

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+0.3 kn	+7%	+9%	−57%	–	Same speed, fuel per mile up 7%; in line with the speed change.
2023→2024	−0.9 kn	−2%	−8%	+55%	−10%	0.9 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+2.2 kn	+11%	+33%	−75%	−17%	2.2 kn faster, fuel per mile up 11%; better than speed alone explains (hull, engine or trade).
2021→2022	−0.2 kn	−11%	−12%	+100%	+11%	Same speed, fuel per mile down 11%; better than speed alone explains (hull, engine or trade).
2020→2021	−0.2 kn	−5%	−6%	−21%	−4%	Same speed, fuel per mile down 5%; in line with the speed change.

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	Odfjell Management AS	681	2,140	5,815	444	13.1	117.2	–	–
2024	Odfjell Management AS	1,478	4,612	13,473	1,050	12.8	109.7	8.86	–
2023	not published	973	3,090	8,718	638	13.7	111.7	9.86	–
2022	not published	3,463	10,961	34,576	3,016	11.5	100.2	11.93	–
2021	not published	1,934	6,133	17,249	1,472	11.7	112.2	10.76	–
2020	not published	2,557	8,085	21,767	1,836	11.9	117.5	11.22	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025	Odfjell Management AS	–	–	–	–	DNV	B+C
2024	Odfjell Management AS	8.86	16.73	−47%	159 of 1,274	DNV	B+C
2023	not published	9.86	16.23	−39%	197 of 1,314	DNV	B+C
2022	not published	11.93	16.06	−26%	393 of 1,409	DNV	B
2021	not published	10.76	16.69	−36%	240 of 1,343	DNV	B
2020	not published	11.22	16.16	−31%	265 of 1,312	DNV	B

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