Navalyze · Ro-ro · Ship

ISM company (DoC holder) in 2025: Visemar di Navigazione Srl

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 783,127 t of cargo on average.

Fuel kg/nm

89.0

Ro-ro median 108 kg/nm (−18%)

CO₂ per transport work (cargo)

0.71

g CO₂/t·nm · Ro-ro median 91.0 (−99%)

Average speed

14.7 kn

Ro-ro median 14.7 kn (+0%)

Fuel per day at sea

31.3 t/day

Fuel consumed

8,982 t

CO₂ emitted

56,124 t

Distance sailed

100,939 nm

CO₂ ÷ CO₂ per mile

Time at sea

6,877 h

287 days, 79% of the year

Within the ro-ro fleet, 2025

Set against all 235 ro-ro 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 96.6 kg/nm · median 105 (−8%)

56.6Ranks 92 of 235, lowest first145

Average speedThis ship 14.1 kn · median 14.4 (−2%)

10.9Faster than 45% of ro-ro ships17.0

CO₂ per transport work (cargo)This ship 69.4 g CO₂/t·nm · median 95.2 (−27%)

47.4Ranks 61 of 235, lowest first297

Middle 80% of shipsMiddle 50%Ro-ro 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 ports96%
From the EU0%
Into the EU0%
At berth in the EU4%

Fuel burned laden

–

Not reported

CO₂ at berth

1,122 t

2.0% 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-ro median is the middle ship of all ro-ro ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

GRENDI STAR
Ro-ro median

80.0100.0120.0140.0

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

Average speed, kn

GRENDI STAR
Ro-ro median

14.014.515.015.5

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

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

GRENDI STAR
Ro-ro median

0.050.0100150

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.5 kn	−2%	−6%	−18%	+13%	0.5 kn slower, fuel per mile down 2%; in line with the speed change.
2023→2024	+0.0 kn	−1%	−0%	+3%	−9%	Same speed, fuel per mile flat.
2022→2023	+0.1 kn	+3%	+3%	−2%	+38%	Same speed, fuel per mile up 3%; in line with the speed change.
2021→2022	+0.0 kn	−4%	−4%	+7%	+17%	Same speed, fuel per mile down 4%; in line with the speed change.
2020→2021	+0.5 kn	+8%	+11%	−3%	−30%	0.5 kn faster, fuel per mile up 8%; in line with the speed change.
2019→2020	−0.1 kn	+5%	+4%	−8%	−15%	Same speed, fuel per mile up 5%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	−0.6 kn	−0%	−4%	+2%	+9,659%	0.6 kn slower, fuel per mile flat; 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	Visemar di Navigazione Srl	7,725	24,165	79,995	5,690	14.1	96.6	69.4	–
2024	Visemar di Navigazione Srl	9,675	30,271	97,829	6,691	14.6	98.9	61.5	–
2023	not published	9,497	29,720	95,440	6,541	14.6	99.5	67.5	–
2022	not published	9,441	29,534	97,616	6,729	14.5	96.7	–	–
2021	not published	9,190	28,757	91,383	6,296	14.5	101	–	–
2020	not published	8,749	27,318	93,959	6,689	14.0	93.1	59.0	–
2019	not published	9,116	28,452	102,599	7,258	14.1	88.8	69.3	–
2018	not published	8,982	56,124	100,939	6,877	14.7	89.0	0.71	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Ro-ro median	vs Ro-ro	Rank	Verifier	Methods
2025	Visemar di Navigazione Srl	69.4	95.2	−27%	61 of 235	DNV	B
2024	Visemar di Navigazione Srl	61.5	97.5	−37%	37 of 220	DNV	B
2023	not published	67.5	109	−38%	47 of 221	DNV	B
2022	not published	48.9	7.68	+536%	58 of 59	DNV	B
2021	not published	41.6	8.10	+413%	54 of 62	DNV	B
2020	not published	59.0	103	−43%	36 of 238	RINA	–
2019	not published	69.3	90.9	−24%	73 of 271	RINA	–
2018	not published	0.71	91.0	−99%	3 of 260	RINA	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Ro-ro ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·nm. 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-ro 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.