Navalyze · Ro-pax · Ship

SEVEN SISTERS

IMO: 9320130
Type: Ro-pax ship
Flag (estimated): France
Port of registry: Dieppe
Technical efficiency: EEXI 37.31 g CO₂/t·nm

ISM company (DoC holder) in 2025: DFDS A/S · part of DFDS

Report year

2020 at a glance

From the 2020 THETIS-MRV report.

Fuel kg/nm

109

Ro-pax median 157 kg/nm (−30%)

CO₂ per transport work (pax)

1,922

g CO₂/pax·nm · Ro-pax median 751 (+156%)

CO₂ per transport work (freight)

207

g CO₂/t·nm · Ro-pax median 217 (−5%)

Average speed

15.8 kn

Ro-pax median 15.8 kn (+0%)

Fuel per day at sea

41.3 t/day

Fuel consumed

4,794 t

CO₂ emitted

14,928 t

Distance sailed

43,887 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,785 h

116 days, 32% of the year

Within the ro-pax fleet, 2025

Set against all 408 ro-pax 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 114 kg/nm · median 150 (−24%)

69.3Ranks 110 of 408, lowest first232

Average speedThis ship 14.4 kn · median 15.8 (−9%)

12.0Faster than 33% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 807 g CO₂/pax·nm · median 567 (+43%)

66.8Ranks 262 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 320 g CO₂/t·nm · median 253 (+26%)

48.6Ranks 223 of 408, lowest first1,247

Middle 80% of shipsMiddle 50%Ro-pax 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 ports96%
From the EU0%
Into the EU0%
At berth in the EU4%

Fuel burned laden

–

Not reported

CO₂ at berth

664 t

4.5% 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 Ro-pax median is the middle ship of all ro-pax ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

SEVEN SISTERS
Ro-pax median

100.0120.0140.0160.0

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

Average speed, kn

SEVEN SISTERS
Ro-pax median

14.014.515.015.516.016.5

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

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

SEVEN SISTERS
Ro-pax median

200300400500

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

CO₂ per transport work (pax), g CO₂/pax·nm

SEVEN SISTERS
Ro-pax median

0.01,0002,0003,0004,0005,000

’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	−0.2 kn	−2%	−3%	+10%	+13%	Same speed, fuel per mile flat.
2023→2024	−0.1 kn	−4%	−5%	+4%	−7%	Same speed, fuel per mile down 4%; in line with the speed change.
2022→2023	−0.9 kn	−4%	−10%	−10%	−17%	0.9 kn slower, fuel per mile down 4%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.7 kn	+13%	+19%	+3%	−78%	0.7 kn faster, fuel per mile up 13%; in line with the speed change.
2020→2021	−0.9 kn	+2%	−4%	+26%	+118%	0.9 kn slower, fuel per mile up 2%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+0.3 kn	−3%	−1%	−16%	+140%	0.3 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2018→2019	+0.9 kn	−7%	−1%	−7%	−54%	0.9 kn faster, fuel per mile down 7%; better than speed alone explains (hull, engine 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	DFDS A/S	6,669	20,792	58,538	4,063	14.4	114	–	–
2024	DFDS A/S	6,173	19,252	53,136	3,637	14.6	116	–	–
2023	not published	6,187	19,296	51,220	3,476	14.7	121	–	–
2022	not published	7,155	22,315	56,680	3,634	15.6	126	–	–
2021	not published	6,169	19,254	55,261	3,716	14.9	112	–	–
2020	not published	4,794	14,928	43,887	2,785	15.8	109	–	–
2019	not published	5,914	18,460	52,534	3,388	15.5	113	–	–
2018	not published	6,805	21,260	56,363	3,864	14.6	121	446	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/pax·nm	Ro-pax median	vs Ro-pax	Rank	Freight, g CO₂/t·nm	Ro-pax median	vs Ro-pax	Verifier	Methods
2025	DFDS A/S	807	567	+43%	262 of 408	320	253	+26%	DNV	B
2024	DFDS A/S	712	547	+30%	242 of 404	354	233	+52%	DNV	B+C
2023	not published	770	680	+13%	218 of 386	318	234	+36%	DNV	B+C
2022	not published	924	626	+48%	252 of 394	282	253	+12%	DNV	B+C
2021	not published	4,195	815	+415%	366 of 377	453	226	+101%	Verifavia	B+C
2020	not published	1,922	751	+156%	324 of 387	207	217	−5%	Verifavia	B+C
2019	not published	800	569	+41%	242 of 394	209	223	−6%	Verifavia	B+C
2018	not published	1,722	729	+136%	288 of 361	–	–	–	Verifavia	B+C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Ro-pax ships are benchmarked on CO₂ per transport work (pax) (TW), in g CO₂/pax·nm, and also per tonne of freight (g CO₂/t·nm freight). CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's ro-pax 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.