Navalyze · Chemical tanker · Ship

SWAN ATLANTIC

IMO: 9790464
Type: Chemical tanker
Average cargo carried: 8,109 t
Flag (estimated): Cayman Islands
Port of registry: George Town
Technical efficiency: EEXI 6.99 g CO₂/t·nm
Former names: SUMMER PLOEG

ISM company (DoC holder) in 2025: INVENTOR CHEMICAL TANKERS AS

Report year

2020 at a glance

From the 2020 THETIS-MRV report. Carries about 14,593 t of cargo on average.

Fuel kg/nm

67.6

Chemical tanker median 85.7 kg/nm (−21%)

CO₂ per transport work (cargo)

14.5

g CO₂/t·nm · Chemical tanker median 16.2 (−11%)

Average speed

14.5 kn

Chemical tanker median 11.4 kn (+27%)

Fuel per day at sea

23.5 t/day

Fuel consumed

1,741 t

CO₂ emitted

5,432 t

Distance sailed

25,742 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,778 h

74 days, 20% 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 kg/nmThis ship 70.6 kg/nm · median 79.7 (−11%)

52.8Ranks 510 of 1,460, lowest first111

Average speedThis ship 11.4 kn · median 11.1 (+3%)

8.8Faster than 59% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 27.1 g CO₂/t·nm · median 15.0 (+80%)

7.93Ranks 1,129 of 1,460, lowest first40.2

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2020

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 ports6%
From the EU22%
Into the EU63%
At berth in the EU8%

Fuel burned laden

–

Not reported

CO₂ at berth

450 t

8.3% 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 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 kg/nm

SWAN ATLANTIC
Chemical tanker median

50.075.0100.0125.0150.0175.0

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

Average speed, kn

SWAN ATLANTIC
Chemical tanker median

10.012.014.016.0

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

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

SWAN ATLANTIC
Chemical tanker median

10.020.030.040.0

’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	−0.9 kn	+4%	−3%	−15%	+4%	0.9 kn slower, fuel per mile up 4%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−2.3 kn	−7%	−22%	+48%	−3%	2.3 kn slower, fuel per mile down 7%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.9 kn	−54%	−51%	+128%	−27%	0.9 kn faster, fuel per mile down 54%; better than speed alone explains (hull, engine or trade).
2021→2022	−1.2 kn	+115%	+98%	+223%	+89%	1.2 kn slower, fuel per mile up 115%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.4 kn	+9%	+12%	−80%	+34%	0.4 kn faster, fuel per mile up 9%; in line with the speed change.
2019→2020	+0.8 kn	−15%	−10%	+140%	−25%	0.8 kn faster, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2018→2019	+0.4 kn	+23%	+27%	−43%	+60%	0.4 kn faster, fuel per mile up 23%; 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	INVENTOR CHEMICAL TANKERS AS	3,324	10,363	47,108	4,133	11.4	70.6	27.1	–
2024	INVENTOR CHEMICAL TANKERS AS	3,736	11,640	55,246	4,498	12.3	67.6	26.0	–
2023	not published	2,725	8,588	37,355	2,552	14.6	73.0	26.9	–
2022	not published	2,606	8,119	16,419	1,195	13.7	159	36.6	–
2021	not published	375	1,181	5,083	341	14.9	73.7	19.4	–
2020	not published	1,741	5,432	25,742	1,778	14.5	67.6	14.5	–
2019	not published	854	2,665	10,745	782	13.7	79.4	19.2	–
2018	not published	1,218	3,808	18,818	1,418	13.3	64.7	12.0	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025	INVENTOR CHEMICAL TANKERS AS	27.1	15.0	+80%	1,129 of 1,460	DNV	B+C
2024	INVENTOR CHEMICAL TANKERS AS	26.0	16.7	+56%	922 of 1,274	DNV	C
2023	not published	26.9	16.2	+65%	970 of 1,314	ClassNK	A
2022	not published	36.6	16.1	+128%	1,223 of 1,409	ClassNK	A
2021	not published	19.4	16.7	+16%	819 of 1,343	ClassNK	A
2020	not published	14.5	16.2	−11%	529 of 1,312	ClassNK	A
2019	not published	19.2	17.3	+11%	768 of 1,321	ClassNK	A
2018	not published	12.0	17.1	−30%	331 of 1,294	ABS	C

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.