Navalyze · Chemical tanker · Ship

DDELPHINUS 12

IMO: 9359375
Type: Chemical tanker
Average cargo carried: 17,711 t
Flag (estimated): Cayman Islands (from the 2024 report)
Technical efficiency: EEXI 5.17 g CO₂/t·nm
Former names: STOLT SISTO

ISM company (DoC holder) in 2025: East Sun Maritime Management JSC

Report year

2021 at a glance

From the 2021 THETIS-MRV report. Carries about 25,521 t of cargo on average.

Fuel kg/nm

113

Chemical tanker median 83.0 kg/nm (+37%)

CO₂ per transport work (cargo)

14.0

g CO₂/t·nm · Chemical tanker median 16.7 (−16%)

Average speed

10.7 kn

Chemical tanker median 11.2 kn (−4%)

Fuel per day at sea

29.2 t/day

Fuel consumed

3,613 t

CO₂ emitted

11,347 t

Distance sailed

31,849 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,966 h

124 days, 34% 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 99.6 kg/nm · median 79.7 (+25%)

52.8Ranks 1,167 of 1,460, lowest first111

Average speedThis ship 15.1 kn · median 11.1 (+36%)

8.8Faster than 100% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 17.9 g CO₂/t·nm · median 15.0 (+19%)

7.93Ranks 870 of 1,460, lowest first40.2

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2021

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 ports16%
From the EU40%
Into the EU31%
At berth in the EU13%

Fuel burned laden

–

Not reported

CO₂ at berth

1,441 t

12.7% 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

DDELPHINUS 12
Chemical tanker median

70.080.090.0100.0110.0120.0

’202020’212021’222022’232023’242024’252025

Average speed, kn

DDELPHINUS 12
Chemical tanker median

10.012.014.016.0

’202020’212021’222022’232023’242024’252025

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

DDELPHINUS 12
Chemical tanker median

7.510.012.515.017.520.0

’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	+4.6 kn	−1%	+43%	−71%	+6%	4.6 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2023→2024	−1.6 kn	+6%	−8%	−7%	+52%	1.6 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−0.1 kn	+8%	+7%	+302%	+29%	Same speed, fuel per mile up 8%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+1.5 kn	−23%	−12%	−79%	−38%	1.5 kn faster, fuel per mile down 23%; better than speed alone explains (hull, engine or trade).
2020→2021	−2.3 kn	+23%	+1%	+383%	+35%	2.3 kn slower, fuel per mile up 23%; worse than speed alone explains (fouling, weather, loading or trade).

Part-year reports are left out of these comparisons. 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	East Sun Maritime Management JSC	734	2,339	7,369	487	15.1	99.6	17.9	–
2024part-year	Stolt Tankers BV	2,297	7,255	21,842	2,126	10.3	105	15.3	–
2024	East Sun Maritime Management JSC	2,541	8,025	25,358	2,411	10.5	100	16.9	–
2023	not published	2,587	8,134	27,291	2,256	12.1	94.8	11.1	–
2022	not published	594	1,853	6,793	557	12.2	87.5	8.60	–
2021	not published	3,613	11,347	31,849	2,966	10.7	113	14.0	–
2020	not published	609	1,903	6,598	507	13.0	92.3	10.3	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025	East Sun Maritime Management JSC	17.9	15.0	+19%	870 of 1,460	ClassNK	A
2024part-year	Stolt Tankers BV	–	–	–	–	DNV	B
2024	East Sun Maritime Management JSC	16.9	16.7	+1%	647 of 1,274	ClassNK	B
2023	not published	11.1	16.2	−32%	297 of 1,314	DNV	B
2022	not published	8.60	16.1	−46%	110 of 1,409	DNV	B
2021	not published	14.0	16.7	−16%	485 of 1,343	DNV	B
2020	not published	10.3	16.2	−36%	199 of 1,312	Lloyd's Register	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.