Navalyze · Chemical tanker · Ship

MONA SWAN

IMO: 9371804
Type: Chemical tanker
Average cargo carried: 4,367 t
Port of registry: Middelfart
Technical efficiency: EIV 15.77 g CO₂/t·nm
Ice class: IC

ISM company (DoC holder) in 2025: Uni-Tankers A/S

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 4,367 t of cargo on average.

Fuel per mile

61.4 kg/nm

Chemical tanker median 79.7 kg/nm (−23%)

CO₂ per transport work (cargo)

45.10

g CO₂/t·nm · Chemical tanker median 15.04 (+200%)

Average speed

10.5 kn

Chemical tanker median 11.1 kn (−5%)

Fuel per day at sea

15.4 t/day

Fuel consumed

1,192 t

CO₂ emitted

3,822 t

3,881 t CO₂eq incl. CH₄ and N₂O

Distance sailed

19,407 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,856 h

77 days, 21% of the year

Within the chemical tanker fleet, 2025

Set against all 1,460 chemical 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 per mileThis ship 61.4 kg/nm · median 79.7 (−23%)

52.8Ranks 285 of 1,460, lowest first111.0

Average speedThis ship 10.5 kn · median 11.1 (−5%)

8.8Faster than 32% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 45.10 g CO₂/t·nm · median 15.04 (+200%)

7.93Ranks 1,353 of 1,460, lowest first40.17

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 ports19%
From the EU36%
Into the EU31%
At berth in the EU14%

66% of this ship's CO₂ falls under the EU ETS (2,537 t).

Fuel burned laden

46%

54% in ballast or unladen

CO₂ at berth

13.7%

Alongside in EU ports

Methane (CH₄)

0.1 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

MONA SWAN
Chemical tanker median

40.060.080.0100.0120.0

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

Average speed, kn

MONA SWAN
Chemical tanker median

2.55.07.510.012.5

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

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

MONA SWAN
Chemical tanker median

0.020.040.060.080.0

’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	+0.4 kn	−9%	−6%	+8%	−13%	0.4 kn faster, fuel per mile down 9%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.8 kn	−32%	−36%	+33%	−31%	0.8 kn slower, fuel per mile down 32%; better than speed alone explains (hull, engine or trade).
2022→2023	+2.8 kn	−9%	+22%	+30%	+39%	2.8 kn faster, fuel per mile down 9%; better than speed alone explains (hull, engine or trade).
2021→2022	−3.1 kn	+35%	−3%	−16%	−25%	3.1 kn slower, fuel per mile up 35%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−0.1 kn	−9%	−10%	−1%	−6%	Same speed, fuel per mile down 9%; better than speed alone explains (hull, engine or trade).
2019→2020	+8.3 kn	+18%	+346%	−29%	+29%	8.3 kn faster, fuel per mile up 18%; better than speed alone explains (hull, engine or trade).
2018→2019	−1.2 kn	+37%	−4%	−39%	+60%	1.2 kn slower, fuel per mile up 37%; 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	Uni-Tankers A/S	1,192	3,822	19,407	1,856	10.5	61.4	45.10	46%
2024	Uni-Tankers A/S	1,205	3,657	17,890	1,767	10.1	67.4	51.59	37%
2023	not published	1,333	4,273	13,488	1,241	10.9	98.8	74.82	–
2022	not published	1,130	3,621	10,377	1,283	8.1	108.9	53.97	–
2021	not published	995	3,190	12,308	1,097	11.2	80.8	71.54	–
2020	not published	1,106	3,545	12,433	1,101	11.3	88.9	76.24	–
2019	not published	1,324	4,245	17,520	5,887	3.0	75.6	59.22	–
2018	not published	1,582	5,072	28,612	6,789	4.2	55.3	37.04	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025	Uni-Tankers A/S	45.10	15.04	+200%	1,353 of 1,460	ABS	B
2024	Uni-Tankers A/S	51.59	16.73	+208%	1,200 of 1,274	ABS	B
2023	not published	74.82	16.23	+361%	1,294 of 1,314	ABS	B
2022	not published	53.97	16.06	+236%	1,354 of 1,409	Bureau Veritas	B
2021	not published	71.54	16.69	+329%	1,327 of 1,343	Bureau Veritas	B
2020	not published	76.24	16.16	+372%	1,299 of 1,312	Bureau Veritas	B
2019	not published	59.22	17.32	+242%	1,277 of 1,321	Bureau Veritas	B
2018	not published	37.04	17.14	+116%	1,099 of 1,294	Bureau Veritas	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.