Navalyze · Ro-pax · Ship

ISLE OF INNISFREE

IMO: 8908466
Type: Ro-pax ship
Port of registry: Limassol
Technical efficiency: EEXI 30.76 g CO₂/t·nm
Former names: CALAIS SEAWAYS

ISM company (DoC holder) in 2025: Matrix Ship Management LTD

Report year

2025 at a glance

From the 2025 THETIS-MRV report.

Fuel per mile

183.6 kg/nm

Ro-pax median 150.2 kg/nm (+22%)

CO₂ per transport work (pax)

532

g CO₂/pax·nm · Ro-pax median 567 (−6%)

CO₂ per transport work (freight)

500

g CO₂/t·nm · Ro-pax median 253 (+98%)

Average speed

15.5 kn

Ro-pax median 15.8 kn (−2%)

Fuel per day at sea

68.3 t/day

Fuel consumed

15,547 t

CO₂ emitted

48,647 t

49,411 t CO₂eq incl. CH₄ and N₂O

Distance sailed

84,689 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,461 h

228 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 per mileThis ship 183.6 kg/nm · median 150.2 (+22%)

69.3Ranks 304 of 408, lowest first232.4

Average speedThis ship 15.5 kn · median 15.8 (−2%)

12.0Faster than 45% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 532.46 g CO₂/pax·nm · median 566.51 (−6%)

66.76Ranks 195 of 408, lowest first1,568.87

CO₂ per transport work (freight)This ship 500.22 g CO₂/t·nm · median 253.18 (+98%)

48.59Ranks 275 of 408, lowest first1,247.19

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

Where the emissions happen, 2025

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 EU49%
Into the EU46%
At berth in the EU4%

52% of this ship's CO₂ falls under the EU ETS (25,318 t).

Fuel burned laden

–

Not reported

CO₂ at berth

4.0%

Alongside in EU ports

Methane (CH₄)

0.8 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

Uplift from CH₄ and N₂O, counted in full from 2026

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 per mile, kg/nm

ISLE OF INNISFREE
Ro-pax median

120.0140.0160.0180.0200.0220.0

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

Average speed, kn

ISLE OF INNISFREE
Ro-pax median

13.014.015.016.017.0

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

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

ISLE OF INNISFREE
Ro-pax median

200300400500600

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

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

ISLE OF INNISFREE
Ro-pax median

0.01,0002,0003,0004,000

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+1.0 kn	+2%	+9%	+11%	+8%	1.0 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2023→2024	+0.6 kn	−6%	−2%	+5%	−5%	0.6 kn faster, fuel per mile down 6%; better than speed alone explains (hull, engine or trade).
2022→2023	−0.3 kn	+2%	−0%	−3%	+1,042%	Same speed, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.2 kn	+39%	+41%	+61%	+44%	Same speed, fuel per mile up 39%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.2 kn	−35%	−34%	+5%	−99%	Same speed, fuel per mile down 35%; better than speed alone explains (hull, engine or trade).
2019→2020	−0.2 kn	+10%	+9%	−41%	+109%	Same speed, fuel per mile up 10%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	+0.0 kn	+3%	+3%	+1%	−46%	Same speed, fuel per mile up 3%; 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	Matrix Ship Management LTD	15,547	48,647	84,689	5,461	15.5	183.6	–	–
2024	Matrix Ship Management LTD	13,808	43,428	76,513	5,279	14.5	180.5	–	–
2023	not published	13,941	44,068	72,669	5,223	13.9	191.8	–	–
2022	not published	14,128	45,094	74,912	5,273	14.2	188.6	–	–
2021	not published	6,316	19,838	46,465	3,319	14.0	135.9	–	–
2020	not published	9,226	28,897	44,367	3,218	13.8	207.9	–	–
2019	not published	14,095	44,150	74,862	5,341	14.0	188.3	–	–
2018	not published	13,550	42,426	74,027	5,274	14.0	183.0	400.94	–

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	Matrix Ship Management LTD	532.46	566.51	−6%	195 of 408	500.22	253.18	+98%	DNV	B+C
2024	Matrix Ship Management LTD	491.12	546.68	−10%	194 of 404	497.73	232.85	+114%	DNV	B+C
2023	not published	519.30	680.04	−24%	159 of 386	489.78	233.94	+109%	DNV	B+C
2022	not published	45.47	626.32	−93%	25 of 394	560.77	252.90	+122%	DNV	B+C
2021	not published	31.54	815.19	−96%	22 of 377	377.13	226.00	+67%	DNV	B+C
2020	not published	3,221.89	750.91	+329%	363 of 387	215.40	217.49	−1%	Verifavia	B
2019	not published	1,545.09	569.03	+172%	343 of 394	214.61	222.56	−4%	Verifavia	B
2018	not published	2,837.37	728.92	+289%	325 of 361	–	–	–	Verifavia	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.