Navalyze · Chemical tanker · Ship

SEA CUMULUS

IMO: 9724532
Type: Chemical tanker
Average cargo carried: 16,841 t
Flag (estimated): Marshall Islands
Port of registry: Majuro
Technical efficiency: EEDI 5.33 g CO₂/t·nm
Ice class: IB
Former names: BRITISH CUMULUS, MAERSK CUMULUS

ISM company (DoC holder) in 2025: Pantheon Tankers Management Ltd

Report year

2019 at a glance

From the 2019 THETIS-MRV report. Carries about 13,743 t of cargo on average.

Fuel kg/nm

143

Chemical tanker median 88.3 kg/nm (+62%)

CO₂ per transport work (cargo)

32.6

g CO₂/t·nm · Chemical tanker median 17.3 (+88%)

Average speed

6.7 kn

Chemical tanker median 10.1 kn (−34%)

Fuel per day at sea

23.0 t/day

Fuel consumed

3,803 t

CO₂ emitted

11,910 t

Distance sailed

26,550 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,964 h

165 days, 45% 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 99.5 kg/nm · median 79.7 (+25%)

52.8Ranks 1,165 of 1,460, lowest first111

Average speedThis ship 9.0 kn · median 11.1 (−19%)

8.8Faster than 11% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 18.7 g CO₂/t·nm · median 15.0 (+24%)

7.93Ranks 896 of 1,460, lowest first40.2

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2019

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 ports37%
From the EU17%
Into the EU37%
At berth in the EU10%

Fuel burned laden

–

Not reported

CO₂ at berth

1,178 t

9.9% 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

SEA CUMULUS
Chemical tanker median

60.080.0100.0120.0140.0160.0

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

Average speed, kn

SEA CUMULUS
Chemical tanker median

6.08.010.012.014.0

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

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

SEA CUMULUS
Chemical tanker median

10.020.030.040.050.060.0

’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	+0.3 kn	+7%	+10%	+7%	+1%	0.3 kn faster, fuel per mile up 7%; in line with the speed change.
2023→2024	−1.5 kn	+23%	+5%	+56%	+23%	1.5 kn slower, fuel per mile up 23%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−2.0 kn	−20%	−34%	−41%	−13%	2.0 kn slower, fuel per mile down 20%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.6 kn	+13%	+19%	−8%	+19%	0.6 kn faster, fuel per mile up 13%; in line with the speed change.
2020→2021	+1.9 kn	−36%	−25%	+22%	−73%	1.9 kn faster, fuel per mile down 36%; better than speed alone explains (hull, engine or trade).
2019→2020	+3.0 kn	−8%	+34%	+36%	+67%	3.0 kn faster, fuel per mile down 8%; better than speed alone explains (hull, engine or trade).
2018→2019	−1.0 kn	+45%	+26%	−47%	+100%	1.0 kn slower, fuel per mile up 45%; 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	Pantheon Tankers Management Ltd	3,943	12,478	39,642	4,421	9.0	99.5	18.7	45%
2024	Pantheon Tankers Management Ltd	3,428	10,808	37,033	4,251	8.7	92.6	18.5	43%
2023	not published	1,794	5,659	23,781	2,339	10.2	75.4	15.1	49%
2022	not published	3,831	12,076	40,444	3,308	12.2	94.7	17.3	43%
2021	not published	3,687	11,669	43,874	3,796	11.6	84.0	14.5	–
2020	not published	4,765	14,963	36,065	3,703	9.7	132	54.5	–
2019	not published	3,803	11,910	26,550	3,964	6.7	143	32.6	–
2018	not published	4,919	15,648	49,640	6,488	7.7	99.1	16.4	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025	Pantheon Tankers Management Ltd	18.7	15.0	+24%	896 of 1,460	ABS	A
2024	Pantheon Tankers Management Ltd	18.5	16.7	+11%	721 of 1,274	ABS	A
2023	not published	15.1	16.2	−7%	598 of 1,314	ABS	–
2022	not published	17.3	16.1	+8%	769 of 1,409	ABS	A+B+C
2021	not published	14.5	16.7	−13%	528 of 1,343	ABS	A+B+C
2020	not published	54.5	16.2	+237%	1,266 of 1,312	ABS	A+B+C
2019	not published	32.6	17.3	+88%	1,077 of 1,321	ABS	–
2018	not published	16.4	17.1	−5%	597 of 1,294	ABS	A

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.