Navalyze · Ro-pax · Ship

MANANNAN

IMO: 9176072
Type: Ro-pax ship
Flag (estimated): Isle of Man
Port of registry: Douglas
Technical efficiency: EIV 599.76 g CO₂/t·nm

ISM company (DoC holder) in 2025: Isle of Man Steam Packet Co

Report year

2018 at a glance

From the 2018 THETIS-MRV report.

Fuel kg/nm

137

Ro-pax median 158 kg/nm (−14%)

CO₂ per transport work (pax)

1.47

g CO₂/pax·nm · Ro-pax median 729 (−100%)

CO₂ per transport work (freight)

4.01

g CO₂/t·nm · Ro-pax median 184 (−98%)

Average speed

30.2 kn

Ro-pax median 16.1 kn (+88%)

Fuel per day at sea

98.9 t/day

Fuel consumed

7,886 t

CO₂ emitted

25,283 t

Distance sailed

57,775 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,914 h

80 days, 22% 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 131 kg/nm · median 150 (−13%)

69.3Ranks 139 of 408, lowest first232

Average speedThis ship 26.6 kn · median 15.8 (+68%)

12.0Faster than 96% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 60.8 g CO₂/pax·nm · median 567 (−89%)

66.8Ranks 32 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 0.94 g CO₂/t·nm · median 253 (−100%)

48.6Ranks 22 of 408, lowest first1,247

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

Where the emissions happen, 2018

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 ports50%
From the EU25%
Into the EU25%
At berth in the EU0%

Fuel burned laden

–

Not reported

CO₂ at berth

0 t

0.0% 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

MANANNAN
Ro-pax median

120.0130.0140.0150.0160.0

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

Average speed, kn

MANANNAN
Ro-pax median

15.020.025.030.035.0

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

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

MANANNAN
Ro-pax median

0.0100200300

’182018’192019’202020’212021’222022’252025

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

MANANNAN
Ro-pax median

0.05001,0001,5002,000

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+2.2 kn	−5%	+3%	−15%	+13%	2.2 kn faster, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2022→2024	+0.9 kn	+5%	+9%	+4%	−97%	0.9 kn faster, fuel per mile up 5%; in line with the speed change.
2021→2022	−5.6 kn	−5%	−24%	+66%	+708%	5.6 kn slower, fuel per mile down 5%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+4.7 kn	+14%	+36%	−92%	+1,219%	4.7 kn faster, fuel per mile up 14%; better than speed alone explains (hull, engine or trade).
2019→2020	−1.4 kn	−3%	−8%	−68%	+988%	1.4 kn slower, fuel per mile down 3%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	−4.4 kn	−8%	−21%	−2%	−8%	4.4 kn slower, fuel per mile down 8%; worse than speed alone explains (fouling, weather, loading 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	Isle of Man Steam Packet Co	298	957	2,275	86	26.6	131	–	–
2024	Isle of Man Steam Packet Co	368	1,181	2,662	109	24.4	138	–	–
2022	not published	337	1,080	2,559	109	23.5	132	–	–
2021	not published	215	688	1,543	53	29.1	139	–	–
2020	not published	2,246	7,201	18,335	752	24.4	123	–	–
2019	not published	7,137	22,881	56,559	2,193	25.8	126	–	–
2018	not published	7,886	25,283	57,775	1,914	30.2	137	–	–

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	Isle of Man Steam Packet Co	60.8	567	−89%	32 of 408	0.94	253	−100%	Lloyd's Register	B
2024	Isle of Man Steam Packet Co	53.9	547	−90%	40 of 404	–	–	–	Lloyd's Register	B
2022	not published	1,565	626	+150%	353 of 394	17.7	253	−93%	Lloyd's Register	B
2021	not published	194	815	−76%	91 of 377	3.50	226	−98%	Lloyd's Register	B
2020	not published	14.7	751	−98%	26 of 387	18.5	217	−92%	Lloyd's Register	B
2019	not published	1.35	569	−100%	11 of 394	0.08	223	−100%	Lloyd's Register	B
2018	not published	1.47	729	−100%	11 of 361	4.01	184	−98%	Lloyd's Register	B

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.