Navalyze · Chemical tanker · Ship

DIADEMA

IMO: 9808326
Type: Chemical tanker
Average cargo carried: 20,714 t
Port of registry: Nassau
Technical efficiency: EEXI 5.53 g CO₂/t·nm

ISM company (DoC holder) in 2024: SUPER ECO TANKERS MANAGEMENT INC

Report year

2024 at a glance

From the 2024 THETIS-MRV report. Carries about 20,714 t of cargo on average.

Fuel per mile

87.5 kg/nm

Chemical tanker median 80.8 kg/nm (+8%)

CO₂ per transport work (cargo)

13.25

g CO₂/t·nm · Chemical tanker median 16.73 (−21%)

Average speed

10.2 kn

Chemical tanker median 11.0 kn (−7%)

Fuel per day at sea

21.5 t/day

Fuel consumed

2,588 t

CO₂ emitted

8,119 t

8,246 t CO₂eq incl. CH₄ and N₂O

Distance sailed

29,580 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,892 h

121 days, 33% 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 87.5 kg/nm · median 80.8 (+8%)

53.8Ranks 775 of 1,274, lowest first110.8

Average speedThis ship 10.2 kn · median 11.0 (−7%)

8.7Faster than 32% of chemical tanker ships12.5

CO₂ per transport work (cargo)This ship 13.25 g CO₂/t·nm · median 16.73 (−21%)

8.47Ranks 464 of 1,274, lowest first41.97

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2024

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 ports20%
From the EU33%
Into the EU36%
At berth in the EU11%

65% of this ship's CO₂ falls under the EU ETS (5,308 t).

Fuel burned laden

–

Not reported

CO₂ at berth

11.1%

Alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

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

DIADEMA
Chemical tanker median

70.080.090.0100.0110.0120.0

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

Average speed, kn

DIADEMA
Chemical tanker median

10.010.511.011.512.0

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

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

DIADEMA
Chemical tanker median

12.014.016.018.020.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2023→2024	+0.0 kn	−23%	−23%	+6%	−31%	Same speed, fuel per mile down 23%; better than speed alone explains (hull, engine or trade).
2022→2023	−1.0 kn	+29%	+18%	−6%	+43%	1.0 kn slower, fuel per mile up 29%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.7 kn	+1%	+8%	+69%	−3%	0.7 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2020→2021	−1.4 kn	+6%	−6%	−54%	−23%	1.4 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+0.2 kn	+1%	+2%	+25%	−1%	Same speed, fuel per mile flat.
2018→2019	+0.3 kn	+2%	+5%	−8%	+45%	Same speed, fuel per mile up 2%; 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
2024	SUPER ECO TANKERS MANAGEMENT INC	2,588	8,119	29,580	2,892	10.2	87.5	13.25	–
2023	not published	3,166	10,028	27,849	2,719	10.2	113.7	19.21	–
2022	not published	2,614	8,202	29,558	2,647	11.2	88.4	13.39	–
2021	not published	1,525	4,810	17,459	1,664	10.5	87.4	13.80	–
2020	not published	3,144	9,840	38,035	3,204	11.9	82.7	17.99	–
2019	not published	2,486	7,765	30,407	2,594	11.7	81.7	18.13	–
2018	not published	2,636	8,280	33,042	2,889	11.4	79.8	12.54	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2024	SUPER ECO TANKERS MANAGEMENT INC	13.25	16.73	−21%	464 of 1,274	RINA	A
2023	not published	19.21	16.23	+18%	763 of 1,314	RINA	A
2022	not published	13.39	16.06	−17%	509 of 1,409	RINA	A
2021	not published	13.80	16.69	−17%	471 of 1,343	RINA	A
2020	not published	17.99	16.16	+11%	766 of 1,312	RINA	A
2019	not published	18.13	17.32	+5%	709 of 1,321	RINA	A
2018	not published	12.54	17.14	−27%	364 of 1,294	RINA	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.