Navalyze · Ro-pax · Ship

FINNSIRIUS

IMO: 9902419
Type: Ro-pax ship
Flag (estimated): Finland
Port of registry: Mariehamn
Technical efficiency: EEDI 16.82 g CO₂/t·nm
Ice class: IA Super

ISM company (DoC holder) in 2025: Finnlines Plc · part of Grimaldi Group

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel kg/nm

157

Ro-pax median 153 kg/nm (+2%)

CO₂ per transport work (pax)

136

g CO₂/pax·nm · Ro-pax median 680 (−80%)

CO₂ per transport work (freight)

181

g CO₂/t·nm · Ro-pax median 234 (−23%)

Average speed

14.1 kn

Ro-pax median 16.0 kn (−12%)

Fuel per day at sea

53.1 t/day

Fuel consumed

4,576 t

CO₂ emitted

14,293 t

Distance sailed

29,239 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,067 h

86 days, 24% 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 134 kg/nm · median 150 (−11%)

69.3Ranks 151 of 408, lowest first232

Average speedThis ship 13.3 kn · median 15.8 (−16%)

12.0Faster than 21% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 112 g CO₂/pax·nm · median 567 (−80%)

66.8Ranks 82 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 129 g CO₂/t·nm · median 253 (−49%)

48.6Ranks 124 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 ports91%
From the EU0%
Into the EU3%
At berth in the EU6%

Fuel burned laden

–

Not reported

CO₂ at berth

876 t

6.1% 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

FINNSIRIUS
Ro-pax median

130.0140.0150.0160.0

’232023’242024’252025

Average speed, kn

FINNSIRIUS
Ro-pax median

13.014.015.016.0

’232023’242024’252025

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

FINNSIRIUS
Ro-pax median

100150200250300

’232023’242024’252025

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

FINNSIRIUS
Ro-pax median

0.0200400600800

’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	−7%	−9%	−0%	+1%	Same speed, fuel per mile down 7%; in line with the speed change.
2023→2024	−0.5 kn	−8%	−11%	+176%	−18%	0.5 kn slower, fuel per mile down 8%; 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	Finnlines Plc	10,805	33,676	80,730	6,077	13.3	134	–	–
2024	Finnlines Plc	11,674	36,392	80,805	5,951	13.6	145	–	–
2023	not published	4,576	14,293	29,239	2,067	14.1	157	–	–

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	Finnlines Plc	112	567	−80%	82 of 408	129	253	−49%	RINA	C
2024	Finnlines Plc	111	547	−80%	86 of 404	139	233	−40%	RINA	C
2023	not published	136	680	−80%	73 of 386	181	234	−23%	RINA	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.