Navalyze · Ro-pax · Ship

OPTIMA SEAWAYS

IMO: 9188427
Type: Ro-pax ship
Port of registry: Klaipeda
Technical efficiency: EEXI 22.42 g CO₂/t·nm

ISM company (DoC holder) in 2025: AB DFDS Seaways · part of DFDS

Report year

2025 at a glance

From the 2025 THETIS-MRV report.

Fuel per mile

147.6 kg/nm

Ro-pax median 150.2 kg/nm (−2%)

CO₂ per transport work (pax)

3,241

g CO₂/pax·nm · Ro-pax median 567 (+472%)

CO₂ per transport work (freight)

63.36

g CO₂/t·nm · Ro-pax median 253 (−75%)

Average speed

18.9 kn

Ro-pax median 15.8 kn (+20%)

Fuel per day at sea

66.9 t/day

Fuel consumed

14,937 t

CO₂ emitted

46,696 t

47,430 t CO₂eq incl. CH₄ and N₂O

Distance sailed

101,197 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,362 h

223 days, 61% 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 147.6 kg/nm · median 150.2 (−2%)

69.3Ranks 195 of 408, lowest first232.4

Average speedThis ship 18.9 kn · median 15.8 (+20%)

12.0Faster than 76% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 3,241.48 g CO₂/pax·nm · median 566.51 (+472%)

66.76Ranks 396 of 408, lowest first1,568.87

CO₂ per transport work (freight)This ship 63.36 g CO₂/t·nm · median 253.18 (−75%)

48.59Ranks 51 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 ports96%
From the EU0%
Into the EU0%
At berth in the EU4%

100% of this ship's CO₂ falls under the EU ETS (46,696 t).

Fuel burned laden

–

Not reported

CO₂ at berth

4.3%

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

OPTIMA SEAWAYS
Ro-pax median

130.0140.0150.0160.0

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

Average speed, kn

OPTIMA SEAWAYS
Ro-pax median

14.016.018.020.0

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

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

OPTIMA SEAWAYS
Ro-pax median

0.0100200300

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

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

OPTIMA SEAWAYS
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	−0.4 kn	−1%	−3%	+10%	−15%	0.4 kn slower, fuel per mile flat.
2023→2024	+0.1 kn	−1%	−0%	−20%	+136%	Same speed, fuel per mile flat.
2022→2023	+4.2 kn	+4%	+32%	+88%	+73%	4.2 kn faster, fuel per mile up 4%; better than speed alone explains (hull, engine or trade).
2021→2022	−2.7 kn	−2%	−17%	−27%	+15%	2.7 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+1.1 kn	+6%	+12%	−1%	−11%	1.1 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine or trade).
2019→2020	+0.0 kn	+2%	+3%	+17%	+57%	Same speed, fuel per mile up 2%; in line with the speed change.
2018→2019	−0.1 kn	+2%	+1%	−8%	−74%	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
2025	AB DFDS Seaways	14,937	46,696	101,197	5,362	18.9	147.6	–	–
2024	AB DFDS Seaways	13,732	42,936	92,062	4,771	19.3	149.2	–	–
2023	not published	17,325	54,150	114,665	5,988	19.2	151.1	–	–
2022	not published	8,898	27,843	61,080	4,073	15.0	145.7	–	–
2021	not published	12,423	38,816	83,867	4,746	17.7	148.1	–	–
2020	not published	11,915	37,217	84,899	5,101	16.6	140.3	–	–
2019	not published	9,947	31,085	72,627	4,373	16.6	137.0	–	–
2018	not published	10,687	33,391	79,194	4,745	16.7	134.9	172.55	–

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	AB DFDS Seaways	3,241.48	566.51	+472%	396 of 408	63.36	253.18	−75%	DNV	B
2024	AB DFDS Seaways	3,824.02	546.68	+599%	379 of 404	52.98	232.85	−77%	DNV	B+C
2023	not published	1,617.30	680.04	+138%	342 of 386	170.88	233.94	−27%	DNV	B+C
2022	not published	933.85	626.32	+49%	254 of 394	131.69	252.90	−48%	DNV	B+C
2021	not published	813.49	815.19	−0%	188 of 377	142.42	226.00	−37%	Verifavia	B+C
2020	not published	915.36	750.91	+22%	211 of 387	162.03	217.49	−26%	Verifavia	B+C
2019	not published	583.47	569.03	+3%	204 of 394	128.56	222.56	−42%	Verifavia	B+C
2018	not published	2,264.85	728.92	+211%	310 of 361	–	–	–	Verifavia	B+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.