Navalyze · Ro-pax · Ship

COTENTIN

IMO: 9364978
Type: Ro-pax ship
Flag (estimated): France
Port of registry: Cherbourg
Technical efficiency: EEXI 23.00 g CO₂/t·nm
Former names: STENA BALTICA

ISM company (DoC holder) in 2025: Brittany Ferries BAI SA

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel kg/nm

126

Ro-pax median 153 kg/nm (−18%)

CO₂ per transport work (pax)

2,669

g CO₂/pax·nm · Ro-pax median 680 (+292%)

CO₂ per transport work (freight)

208

g CO₂/t·nm · Ro-pax median 234 (−11%)

Average speed

15.5 kn

Ro-pax median 16.0 kn (−3%)

Fuel per day at sea

46.8 t/day

Fuel consumed

10,591 t

CO₂ emitted

33,954 t

Distance sailed

84,217 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,436 h

227 days, 62% 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 146 kg/nm · median 150 (−3%)

69.3Ranks 187 of 408, lowest first232

Average speedThis ship 17.1 kn · median 15.8 (+8%)

12.0Faster than 63% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 2,165 g CO₂/pax·nm · median 567 (+282%)

66.8Ranks 386 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 142 g CO₂/t·nm · median 253 (−44%)

48.6Ranks 135 of 408, lowest first1,247

Middle 80% of shipsMiddle 50%Ro-pax medianThis ship

Where the emissions happen, 2023

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 ports38%
From the EU27%
Into the EU27%
At berth in the EU8%

Fuel burned laden

–

Not reported

CO₂ at berth

2,869 t

8.5% 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

COTENTIN
Ro-pax median

100.0120.0140.0160.0

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

Average speed, kn

COTENTIN
Ro-pax median

13.014.015.016.017.018.0

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

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

COTENTIN
Ro-pax median

0.0200400600800

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

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

COTENTIN
Ro-pax median

0.02,0004,0006,000

’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	+2.8 kn	+16%	+38%	+6%	−4%	2.8 kn faster, fuel per mile up 16%; better than speed alone explains (hull, engine or trade).
2023→2024	−1.2 kn	+0%	−7%	−6%	−15%	1.2 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.3 kn	−1%	+1%	+12%	−50%	0.3 kn faster, fuel per mile flat.
2021→2022	+1.7 kn	−7%	+5%	+45%	+7,484%	1.7 kn faster, fuel per mile down 7%; better than speed alone explains (hull, engine or trade).
2020→2021	−2.6 kn	+9%	−9%	−30%	−95%	2.6 kn slower, fuel per mile up 9%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+0.2 kn	+5%	+5%	−28%	+71%	Same speed, fuel per mile up 5%; in line with the speed change.
2018→2019	+0.5 kn	+4%	+8%	−1%	−31%	0.5 kn faster, fuel per mile up 4%; 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
2025	Brittany Ferries BAI SA	12,273	38,726	83,972	4,925	17.1	146	–	–
2024	Brittany Ferries BAI SA	9,937	31,850	78,943	5,514	14.3	126	–	–
2023	not published	10,591	33,954	84,217	5,436	15.5	126	–	–
2022	not published	9,590	30,746	75,505	4,957	15.2	127	–	–
2021	not published	7,093	22,716	52,146	3,858	13.5	136	–	–
2020	not published	9,247	29,138	74,111	4,601	16.1	125	–	–
2019	not published	12,249	38,598	102,572	6,432	15.9	119	–	–
2018	not published	11,861	37,379	103,305	6,709	15.4	115	–	–

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	Brittany Ferries BAI SA	2,165	567	+282%	386 of 408	142	253	−44%	Bureau Veritas	A
2024	Brittany Ferries BAI SA	2,261	547	+314%	372 of 404	137	233	−41%	Bureau Veritas	A
2023	not published	2,669	680	+292%	374 of 386	208	234	−11%	Bureau Veritas	A
2022	not published	5,342	626	+753%	392 of 394	271	253	+7%	Bureau Veritas	A
2021	not published	70.4	815	−91%	46 of 377	683	226	+202%	Bureau Veritas	A
2020	not published	1,379	751	+84%	272 of 387	167	217	−23%	Bureau Veritas	–
2019	not published	804	569	+41%	243 of 394	112	223	−50%	Lloyd's Register	–
2018	not published	1,159	729	+59%	242 of 361	107	184	−42%	Lloyd's Register	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.