Navalyze · Ro-pax · Ship

ISLE OF LEWIS

IMO: 9085974
Type: Ro-pax ship
Port of registry: Glasgow
Technical efficiency: EIV 49.04 g CO₂/t·nm

Report year

2020 at a glance

From the 2020 THETIS-MRV report.

Fuel per mile

75.1 kg/nm

Ro-pax median 156.6 kg/nm (−52%)

CO₂ per transport work (pax)

5.70

g CO₂/pax·nm · Ro-pax median 751 (−99%)

CO₂ per transport work (freight)

3.59

g CO₂/t·nm · Ro-pax median 217 (−98%)

Average speed

15.5 kn

Ro-pax median 15.8 kn (−2%)

Fuel per day at sea

27.9 t/day

Fuel consumed

2,391 t

CO₂ emitted

7,666 t

Distance sailed

31,843 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,055 h

86 days, 23% of the year

Within the ro-pax fleet, 2020

Set against all 387 ro-pax ships with a full-year 2020 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 75.1 kg/nm · median 156.6 (−52%)

84.3Ranks 24 of 387, lowest first246.0

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

12.3Faster than 43% of ro-pax ships21.7

CO₂ per transport work (pax)This ship 5.70 g CO₂/pax·nm · median 750.91 (−99%)

38.61Ranks 21 of 387, lowest first2,528.70

CO₂ per transport work (freight)This ship 3.59 g CO₂/t·nm · median 217.49 (−98%)

38.11Ranks 21 of 387, lowest first1,074.81

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

Where the emissions happen, 2020

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 ports89%
From the EU0%
Into the EU0%
At berth in the EU11%

Fuel burned laden

–

Not reported

CO₂ at berth

10.5%

Alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

–

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 LEWIS
Ro-pax median

50.075.0100.0125.0150.0175.0

’182018’192019’202020

Average speed, kn

ISLE OF LEWIS
Ro-pax median

15.415.615.816.016.2

’182018’192019’202020

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

ISLE OF LEWIS
Ro-pax median

0.0100200300

’182018’192019’202020

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

ISLE OF LEWIS
Ro-pax median

0.0200400600800

’182018’192019’202020

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2019→2020	−0.1 kn	+1%	+0%	−28%	+82%	Same speed, fuel per mile flat.
2018→2019	−0.1 kn	−1%	−1%	+1%	−21%	Same speed, fuel per mile flat.

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
2020	not published	2,391	7,666	31,843	2,055	15.5	75.1	–	–
2019	not published	3,278	10,509	44,324	2,835	15.6	74.0	–	–
2018	not published	3,281	10,518	43,920	2,805	15.7	74.7	–	–

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
2020	not published	5.70	750.91	−99%	21 of 387	3.59	217.49	−98%	Lloyd's Register	A
2019	not published	3.14	569.03	−99%	24 of 394	3.14	222.56	−99%	Lloyd's Register	A
2018	not published	4.00	728.92	−99%	27 of 361	4.00	184.05	−98%	Lloyd's Register	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.