Navalyze · Ro-ro · Ship

CORONA SEA

IMO: 9357597
Type: Ro-ro ship
Average cargo carried: 4,784 t
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEXI 15.00 g CO₂/t·nm
Ice class: IA
Fuel (estimated): Oil blended with biofuel or another alternative fuel

ISM company (DoC holder) in 2025: AdMare Ship Management AB

Report year

2021 at a glance

From the 2021 THETIS-MRV report. Carries about 4,648 t of cargo on average.

Fuel kg/nm

155

Ro-ro median 109 kg/nm (+42%)

CO₂ per transport work (cargo)

104

g CO₂/t·nm · Ro-ro median 104 (+0%)

Average speed

17.0 kn

Ro-ro median 14.8 kn (+15%)

Fuel per day at sea

63.1 t/day

Fuel consumed

14,737 t

CO₂ emitted

46,024 t

Distance sailed

95,229 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,602 h

233 days, 64% 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 132 kg/nm · median 105 (+27%)

56.6Ranks 184 of 235, lowest first145

Average speedThis ship 15.9 kn · median 14.4 (+10%)

10.9Faster than 74% of ro-ro ships17.0

CO₂ per transport work (cargo)This ship 85.6 g CO₂/t·nm · median 95.2 (−10%)

47.4Ranks 99 of 235, lowest first297

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

Where the emissions happen, 2021

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 ports88%
From the EU2%
Into the EU2%
At berth in the EU7%

Fuel burned laden

–

Not reported

CO₂ at berth

3,443 t

7.5% 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

CORONA SEA
Ro-ro median

100.0120.0140.0160.0

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

Average speed, kn

CORONA SEA
Ro-ro median

14.015.016.017.018.0

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

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

CORONA SEA
Ro-ro median

80.090.0100110120130

’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	+0.3 kn	−2%	+0%	+8%	−9%	0.3 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2023→2024	+0.2 kn	−2%	−1%	+7%	−14%	Same speed, fuel per mile down 2%; better than speed alone explains (hull, engine or trade).
2022→2023	−1.4 kn	−6%	−14%	−13%	+7%	1.4 kn slower, fuel per mile down 6%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.2 kn	−6%	−7%	−1%	−2%	Same speed, fuel per mile down 6%; in line with the speed change.
2020→2021	+0.0 kn	−1%	−1%	+1%	−10%	Same speed, fuel per mile flat.
2019→2020	−0.1 kn	+4%	+3%	−2%	−6%	Same speed, fuel per mile up 4%; in line with the speed change.
2018→2019	+0.2 kn	−2%	−1%	+13%	+3%	Same speed, fuel per mile down 2%; 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	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025Bio blend	AdMare Ship Management AB	12,555	38,842	94,819	5,959	15.9	132	85.6	–
2024	AdMare Ship Management AB	11,782	36,806	87,557	5,598	15.6	135	94.2	94%
2023	not published	11,305	35,314	81,995	5,336	15.4	138	109	94%
2022	not published	13,740	42,905	94,037	5,599	16.8	146	102	95%
2021	not published	14,737	46,024	95,229	5,602	17.0	155	104	–
2020	not published	14,779	46,148	94,391	5,566	17.0	157	116	–
2019	not published	14,597	45,579	96,488	5,655	17.1	151	123	–
2018	not published	13,197	41,211	85,126	5,044	16.9	155	119	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Ro-ro median	vs Ro-ro	Rank	Verifier	Methods
2025Bio blend	AdMare Ship Management AB	85.6	95.2	−10%	99 of 235	DNV	C
2024	AdMare Ship Management AB	94.2	97.5	−3%	106 of 220	ABS	B
2023	not published	109	109	+0%	113 of 221	ABS	B
2022	not published	102	90.6	+13%	131 of 223	ABS	B
2021	not published	104	104	+0%	111 of 219	Lloyd's Register	B
2020	not published	116	103	+13%	137 of 238	Lloyd's Register	B
2019	not published	123	90.9	+35%	178 of 271	Lloyd's Register	B
2018	not published	119	91.0	+30%	163 of 260	Lloyd's Register	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.