Navalyze · Ro-pax · Ship

MONT ST. MICHEL

IMO: 9238337
Type: Ro-pax ship
Flag (estimated): France
Port of registry: Caen
Technical efficiency: EEXI 31.10 g CO₂/t·nm
Ice class: IC

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

Report year

2021 at a glance

From the 2021 THETIS-MRV report.

Fuel kg/nm

180

Ro-pax median 155 kg/nm (+17%)

CO₂ per transport work (pax)

286

g CO₂/pax·nm · Ro-pax median 815 (−65%)

CO₂ per transport work (freight)

338

g CO₂/t·nm · Ro-pax median 226 (+50%)

Average speed

15.2 kn

Ro-pax median 16.2 kn (−6%)

Fuel per day at sea

65.7 t/day

Fuel consumed

18,463 t

CO₂ emitted

57,552 t

Distance sailed

102,384 nm

CO₂ ÷ CO₂ per mile

Time at sea

6,745 h

281 days, 77% 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 181 kg/nm · median 150 (+21%)

69.3Ranks 296 of 408, lowest first232

Average speedThis ship 15.6 kn · median 15.8 (−1%)

12.0Faster than 46% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 1,002 g CO₂/pax·nm · median 567 (+77%)

66.8Ranks 302 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 84.0 g CO₂/t·nm · median 253 (−67%)

48.6Ranks 77 of 408, lowest first1,247

Middle 80% of shipsMiddle 50%Ro-pax 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 ports0%
From the EU48%
Into the EU48%
At berth in the EU4%

Fuel burned laden

–

Not reported

CO₂ at berth

2,273 t

4.0% 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

MONT ST. MICHEL
Ro-pax median

140.0160.0180.0200.0220.0

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

Average speed, kn

MONT ST. MICHEL
Ro-pax median

14.515.015.516.016.5

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

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

MONT ST. MICHEL
Ro-pax median

0.0100200300400

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

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

MONT ST. MICHEL
Ro-pax median

0.02505007501,0001,250

’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	+0.3 kn	−3%	−1%	+4%	−4%	Same speed, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.2 kn	+2%	+1%	+1%	−2%	Same speed, fuel per mile flat.
2022→2023	+0.1 kn	−3%	−3%	+2%	−10%	Same speed, fuel per mile down 3%; in line with the speed change.
2021→2022	+0.2 kn	+5%	+6%	−7%	+314%	Same speed, fuel per mile up 5%; in line with the speed change.
2020→2021	+0.2 kn	−10%	−9%	+18%	+50%	Same speed, fuel per mile down 10%; better than speed alone explains (hull, engine or trade).
2019→2020	−0.3 kn	+5%	+3%	−16%	+4%	0.3 kn slower, fuel per mile up 5%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	+0.5 kn	−5%	−2%	+14%	−6%	0.5 kn faster, fuel per mile down 5%; 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	Brittany Ferries BAI SA	18,700	58,846	103,213	6,633	15.6	181	–	–
2024	Brittany Ferries BAI SA	18,483	57,696	99,197	6,480	15.3	186	–	–
2023	not published	17,897	55,951	97,816	6,315	15.5	183	–	–
2022	not published	18,078	56,513	95,720	6,214	15.4	189	–	–
2021	not published	18,463	57,552	102,384	6,745	15.2	180	–	–
2020	not published	17,341	54,104	86,609	5,792	15.0	200	–	–
2019	not published	19,541	60,946	102,664	6,710	15.3	190	–	–
2018	not published	18,099	56,464	90,409	6,108	14.8	200	–	–

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	1,002	567	+77%	302 of 408	84.0	253	−67%	Bureau Veritas	A
2024	Brittany Ferries BAI SA	1,039	547	+90%	302 of 404	80.1	233	−66%	Bureau Veritas	A
2023	not published	1,058	680	+56%	288 of 386	84.5	234	−64%	Bureau Veritas	A
2022	not published	1,182	626	+89%	311 of 394	86.7	253	−66%	Bureau Veritas	A
2021	not published	286	815	−65%	114 of 377	338	226	+50%	Bureau Veritas	A
2020	not published	190	751	−75%	97 of 387	272	217	+25%	Bureau Veritas	A
2019	not published	184	569	−68%	103 of 394	265	223	+19%	Bureau Veritas	A
2018	not published	196	729	−73%	95 of 361	278	184	+51%	Bureau Veritas	A

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.