Navalyze · Ro-pax · Ship

VISBORG

IMO: 9223784
Type: Ro-pax ship
Flag (estimated): Malta
Port of registry: Valletta
Technical efficiency: EEXI 23.78 g CO₂/t·nm
Ice class: IA
Former names: VISBY

ISM company (DoC holder) in 2025: Wallenius Marine

Report year

2020 at a glance

From the 2020 THETIS-MRV report.

Fuel kg/nm

228

Ro-pax median 157 kg/nm (+46%)

CO₂ per transport work (pax)

457

g CO₂/pax·nm · Ro-pax median 751 (−39%)

CO₂ per transport work (freight)

717

g CO₂/t·nm · Ro-pax median 217 (+230%)

Average speed

21.8 kn

Ro-pax median 15.8 kn (+38%)

Fuel per day at sea

119.2 t/day

Fuel consumed

16,450 t

CO₂ emitted

51,834 t

Distance sailed

72,100 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,312 h

138 days, 38% 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 174 kg/nm · median 150 (+16%)

69.3Ranks 277 of 408, lowest first232

Average speedThis ship 16.7 kn · median 15.8 (+6%)

12.0Faster than 60% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 841 g CO₂/pax·nm · median 567 (+49%)

66.8Ranks 269 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 215 g CO₂/t·nm · median 253 (−15%)

48.6Ranks 182 of 408, lowest first1,247

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 ports91%
From the EU0%
Into the EU0%
At berth in the EU9%

Fuel burned laden

–

Not reported

CO₂ at berth

4,478 t

8.6% 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

VISBORG
Ro-pax median

150.0175.0200.0225.0250.0

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

Average speed, kn

VISBORG
Ro-pax median

14.016.018.020.022.024.0

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

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

VISBORG
Ro-pax median

0.02004006008001,000

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

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

VISBORG
Ro-pax median

0.02,5005,0007,50010,000

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.6 kn	−12%	−15%	−12%	−18%	0.6 kn slower, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2023→2024	+0.3 kn	−0%	+2%	+26%	−22%	0.3 kn faster, fuel per mile flat.
2022→2023	−3.7 kn	−1%	−18%	−46%	−86%	3.7 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.2 kn	−0%	−1%	−5%	–	Same speed, fuel per mile flat.
2020→2021	−0.9 kn	−12%	−16%	+58%	–	0.9 kn slower, fuel per mile down 12%; in line with the speed change.
2019→2020	−1.1 kn	−7%	−11%	−6%	+2%	1.1 kn slower, fuel per mile down 7%; in line with the speed change.
2018→2019	−0.4 kn	+2%	+0%	−20%	+4%	0.4 kn slower, fuel per mile up 2%; 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	Wallenius Marine	11,459	36,096	65,732	3,938	16.7	174	–	–
2024	Wallenius Marine AB	14,779	46,242	74,329	4,303	17.3	199	–	–
2023	not published	11,762	37,098	59,122	3,483	17.0	199	–	–
2022	not published	21,806	68,711	108,849	5,258	20.7	200	–	–
2021	not published	22,873	72,074	114,115	5,464	20.9	200	–	–
2020	not published	16,450	51,834	72,100	3,312	21.8	228	–	–
2019	not published	18,800	59,239	77,000	3,362	22.9	244	–	–
2018	not published	23,160	72,977	96,800	4,152	23.3	239	–	–

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	Wallenius Marine	841	567	+49%	269 of 408	215	253	−15%	DNV	C
2024	Wallenius Marine AB	1,021	547	+87%	298 of 404	314	233	+35%	DNV	C
2023	not published	1,312	680	+93%	324 of 386	377	234	+61%	DNV	C
2022	not published	9,053	626	+1,345%	393 of 394	309	253	+22%	Lloyd's Register	C
2021	not published	–	–	–	–	–	–	–	Lloyd's Register	C
2020	not published	457	751	−39%	137 of 387	717	217	+230%	MRVControl AB	C
2019	not published	450	569	−21%	168 of 394	801	223	+260%	MRVControl AB	–
2018	not published	434	729	−40%	144 of 361	763	184	+315%	MRVControl AB	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.