Navalyze · Ro-pax · Ship

ROSELLA

IMO: 7901265
Type: Ro-pax ship
Flag (estimated): Finland
Port of registry: Mariehamn
Technical efficiency: EIV 19.00 g CO₂/t·nm
Ice class: IA

Report year

2022 at a glance

From the 2022 THETIS-MRV report.

Fuel kg/nm

124

Ro-pax median 157 kg/nm (−21%)

CO₂ per transport work (pax)

921

g CO₂/pax·nm · Ro-pax median 626 (+47%)

CO₂ per transport work (freight)

1,744

g CO₂/t·nm · Ro-pax median 253 (+590%)

Average speed

14.6 kn

Ro-pax median 16.0 kn (−9%)

Fuel per day at sea

43.6 t/day

Fuel consumed

6,222 t

CO₂ emitted

19,949 t

Distance sailed

50,200 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,429 h

143 days, 39% of the year

Within the ro-pax fleet, 2022

Set against all 394 ro-pax ships with a full-year 2022 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 124 kg/nm · median 157 (−21%)

79.7Ranks 107 of 394, lowest first241

Average speedThis ship 14.6 kn · median 16.0 (−9%)

12.3Faster than 31% of ro-pax ships22.6

CO₂ per transport work (pax)This ship 921 g CO₂/pax·nm · median 626 (+47%)

71.5Ranks 251 of 394, lowest first1,606

CO₂ per transport work (freight)This ship 1,744 g CO₂/t·nm · median 253 (+590%)

66.3Ranks 372 of 394, lowest first1,135

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

Where the emissions happen, 2022

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 ports86%
From the EU0%
Into the EU0%
At berth in the EU14%

Fuel burned laden

–

Not reported

CO₂ at berth

2,709 t

13.6% 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

ROSELLA
Ro-pax median

110.0120.0130.0140.0150.0160.0

’182018’192019’202020’212021’222022

Average speed, kn

ROSELLA
Ro-pax median

14.515.015.516.016.5

’182018’192019’202020’212021’222022

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

ROSELLA
Ro-pax median

0.05001,0001,5002,000

’182018’192019’202020’212021’222022

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

ROSELLA
Ro-pax median

4006008001,0001,200

’182018’192019’202020’212021’222022

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2021→2022	+0.0 kn	+4%	+5%	−7%	−14%	Same speed, fuel per mile up 4%; in line with the speed change.
2020→2021	+0.1 kn	−16%	−15%	+48%	+29%	Same speed, fuel per mile down 16%; better than speed alone explains (hull, engine or trade).
2019→2020	−0.6 kn	+10%	+5%	−38%	+29%	0.6 kn slower, fuel per mile up 10%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	+0.1 kn	+2%	+3%	−1%	+1%	Same speed, fuel per mile up 2%; 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
2022	not published	6,222	19,949	50,200	3,429	14.6	124	–	–
2021	not published	6,389	20,472	53,700	3,683	14.6	119	–	–
2020	not published	5,110	16,102	36,200	2,498	14.5	141	–	–
2019	not published	7,483	23,579	58,101	3,851	15.1	129	–	–
2018	not published	7,402	23,324	58,800	3,914	15.0	126	–	–

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
2022	not published	921	626	+47%	251 of 394	1,744	253	+590%	Verifavia	C
2021	not published	1,067	815	+31%	240 of 377	1,869	226	+727%	Verifavia	C
2020	not published	828	751	+10%	203 of 387	1,487	217	+584%	Verifavia	C
2019	not published	642	569	+13%	218 of 394	1,461	223	+556%	Verifavia	C
2018	not published	637	729	−13%	169 of 361	1,420	184	+672%	Verifavia	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.