Navalyze · Chemical tanker · Ship

DIADEMA

IMO: 9808326
Type: Chemical tanker
Average cargo carried: 20,714 t
Flag (estimated): Bahamas
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 kg/nm

87.5

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

CO₂ per transport work (cargo)

13.3

g CO₂/t·nm · Chemical tanker median 16.7 (−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 kg/nmThis ship 87.5 kg/nm · median 80.8 (+8%)

53.8Ranks 775 of 1,274, lowest first111

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 13.3 g CO₂/t·nm · median 16.7 (−21%)

8.47Ranks 464 of 1,274, lowest first42.0

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2024

THETIS splits each ship's emissions 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

900 t

11.1% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+127 t

+1.6% CO₂eq on top of CO₂ alone, 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 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	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	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	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2024	SUPER ECO TANKERS MANAGEMENT INC	2,588	8,119	29,580	2,892	10.2	87.5	13.3	–
2023	not published	3,166	10,028	27,849	2,719	10.2	114	19.2	–
2022	not published	2,614	8,202	29,558	2,647	11.2	88.4	13.4	–
2021	not published	1,525	4,810	17,459	1,664	10.5	87.4	13.8	–
2020	not published	3,144	9,840	38,035	3,204	11.9	82.7	18.0	–
2019	not published	2,486	7,765	30,407	2,594	11.7	81.7	18.1	–
2018	not published	2,636	8,280	33,042	2,889	11.4	79.8	12.5	–

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	13.3	16.7	−21%	464 of 1,274	RINA	A
2023	not published	19.2	16.2	+18%	763 of 1,314	RINA	A
2022	not published	13.4	16.1	−17%	509 of 1,409	RINA	A
2021	not published	13.8	16.7	−17%	471 of 1,343	RINA	A
2020	not published	18.0	16.2	+11%	766 of 1,312	RINA	A
2019	not published	18.1	17.3	+5%	709 of 1,321	RINA	A
2018	not published	12.5	17.1	−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.