Navalyze · Ro-pax · Ship

MEGA SMERALDA

IMO: 8306486
Type: Ro-pax ship
Flag (estimated): Italy
Port of registry: Genova
Technical efficiency: EIV 3.69 g CO₂/t·nm

ISM company (DoC holder) in 2025: Forship SpA

Report year

2021 at a glance

From the 2021 THETIS-MRV report.

Fuel kg/nm

200

Ro-pax median 155 kg/nm (+29%)

CO₂ per transport work (pax)

67.4

g CO₂/pax·nm · Ro-pax median 815 (−92%)

CO₂ per transport work (freight)

958

g CO₂/t·nm · Ro-pax median 226 (+324%)

Average speed

16.4 kn

Ro-pax median 16.2 kn (+1%)

Fuel per day at sea

78.7 t/day

Fuel consumed

14,333 t

CO₂ emitted

44,740 t

Distance sailed

71,632 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,372 h

182 days, 50% 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 192 kg/nm · median 150 (+27%)

69.3Ranks 318 of 408, lowest first232

Average speedThis ship 15.1 kn · median 15.8 (−4%)

12.0Faster than 38% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 84.2 g CO₂/pax·nm · median 567 (−85%)

66.8Ranks 58 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 876 g CO₂/t·nm · median 253 (+246%)

48.6Ranks 330 of 408, lowest first1,247

Middle 80% of shipsMiddle 50%Ro-pax 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 ports92%
From the EU0%
Into the EU0%
At berth in the EU8%

Fuel burned laden

–

Not reported

CO₂ at berth

3,664 t

8.2% 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

MEGA SMERALDA
Ro-pax median

140.0160.0180.0200.0220.0

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

Average speed, kn

MEGA SMERALDA
Ro-pax median

15.015.516.016.517.0

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

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

MEGA SMERALDA
Ro-pax median

0.02505007501,0001,250

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

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

MEGA SMERALDA
Ro-pax median

0.02004006008001,000

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

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	−7%	−9%	−3%	−10%	0.3 kn slower, fuel per mile down 7%; in line with the speed change.
2022→2024	−0.4 kn	+2%	−1%	−24%	+8%	0.4 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.6 kn	+1%	−2%	+23%	+28%	0.6 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.3 kn	−5%	−3%	+41%	−6%	Same speed, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2019→2020	−0.3 kn	−2%	−4%	−26%	−30%	Same speed, fuel per mile down 2%; in line with the speed change.
2018→2019	−0.2 kn	+12%	+11%	−9%	+45%	Same speed, fuel per mile up 12%; 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	Forship SpA	12,437	39,747	64,935	4,310	15.1	192	–	–
2024	Forship SpA	13,818	43,185	67,076	4,355	15.4	206	–	–
2022	not published	17,797	55,547	87,853	5,551	15.8	203	–	–
2021	not published	14,333	44,740	71,632	4,372	16.4	200	–	–
2020	not published	10,742	33,468	50,982	3,170	16.1	211	–	–
2019	not published	14,849	46,375	68,822	4,196	16.4	216	–	–
2018	not published	14,583	45,426	75,748	4,567	16.6	193	–	–

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	Forship SpA	84.2	567	−85%	58 of 408	876	253	+246%	RINA	C
2024	Forship SpA	93.5	547	−83%	68 of 404	1,006	233	+332%	RINA	C
2022	not published	86.5	626	−86%	55 of 394	923	253	+265%	RINA	C
2021	not published	67.4	815	−92%	41 of 377	958	226	+324%	RINA	C
2020	not published	71.6	751	−90%	52 of 387	946	217	+335%	RINA	C
2019	not published	102	569	−82%	77 of 394	806	223	+262%	RINA	C
2018	not published	70.7	729	−90%	56 of 361	908	184	+393%	RINA	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.