Navalyze · Cruise · Ship

MARELLA DISCOVERY 2

IMO: 9070620
Type: Passenger ship (Cruise Passenger ship)
Port of registry: Nassau
Technical efficiency: EEDI 12.01 g CO₂/t·nm

ISM company (DoC holder) in 2025: MARELLA CRUISES LIMITED

Report year

2025 at a glance

From the 2025 THETIS-MRV report.

Fuel per mile

281.5 kg/nm

Cruise median 263.6 kg/nm (+7%)

CO₂ per transport work (pax)

519

g CO₂/pax·nm · Cruise median 521 (−0%)

Average speed

13.5 kn

Cruise median 13.1 kn (+3%)

Fuel per day at sea

91.5 t/day

Fuel consumed

17,905 t

CO₂ emitted

56,041 t

56,920 t CO₂eq incl. CH₄ and N₂O

Distance sailed

63,600 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,697 h

196 days, 54% of the year

Within the cruise fleet, 2025

Set against all 202 cruise 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 281.5 kg/nm · median 263.6 (+7%)

89.6Ranks 112 of 202, lowest first415.6

Average speedThis ship 13.5 kn · median 13.1 (+3%)

10.8Faster than 58% of cruise ships15.5

CO₂ per transport work (pax)This ship 518.98 g CO₂/pax·nm · median 521.02 (−0%)

302.86Ranks 100 of 202, lowest first1,700.54

Middle 80% of shipsMiddle 50%Cruise 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 ports52%
From the EU19%
Into the EU10%
At berth in the EU18%

72% of this ship's CO₂ falls under the EU ETS (40,104 t).

Fuel burned laden

81%

19% in ballast or unladen

CO₂ at berth

18.0%

Alongside in EU ports

Methane (CH₄)

0.9 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 Cruise median is the middle ship of all cruise ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel per mile, kg/nm

MARELLA DISCOVERY 2
Cruise median

200.0250.0300.0350.0400.0450.0

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

Average speed, kn

MARELLA DISCOVERY 2
Cruise median

10.012.014.016.018.0

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

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

MARELLA DISCOVERY 2
Cruise median

0.050,000100,000150,000

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+0.6 kn	−5%	−1%	+65%	−3%	0.6 kn faster, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2023→2024	−3.7 kn	+6%	−17%	−20%	+9%	3.7 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+1.1 kn	+2%	+10%	+10%	−15%	1.1 kn faster, fuel per mile up 2%; better than speed alone explains (hull, engine or trade).
2020→2022	+2.9 kn	−38%	−24%	+635%	−100%	2.9 kn faster, fuel per mile down 38%; better than speed alone explains (hull, engine or trade).
2019→2020	−1.2 kn	+20%	+9%	−86%	+22,015%	1.2 kn slower, fuel per mile up 20%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	−0.5 kn	+10%	+6%	+6%	+9%	0.5 kn slower, fuel per mile up 10%; 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	MARELLA CRUISES LIMITED	17,905	56,041	63,600	4,697	13.5	281.5	–	81%
2024	MARELLA CRUISES LIMITED	11,407	35,923	38,488	2,975	12.9	296.4	–	76%
2023	not published	13,408	42,197	47,994	2,890	16.6	279.4	–	85%
2022	not published	11,915	37,336	43,614	2,814	15.5	273.2	–	84%
2020	not published	2,628	8,294	5,933	471	12.6	442.9	–	–
2019	not published	15,701	49,174	42,481	3,069	13.8	369.6	–	–
2018	not published	13,537	42,418	40,188	2,813	14.3	336.8	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/pax·nm	Cruise median	vs Cruise	Rank	Verifier	Methods
2025	MARELLA CRUISES LIMITED	518.98	521.02	−0%	100 of 202	ABS	A+B
2024	MARELLA CRUISES LIMITED	536.32	618.41	−13%	92 of 202	ABS	A+B
2023	not published	492.94	625.29	−21%	77 of 202	ABS	A+B
2022	not published	577.89	830.76	−30%	43 of 187	ABS	B
2020	not published	139,793.15	1,168.55	+11,863%	94 of 100	ABS	B
2019	not published	632.12	589.20	+7%	95 of 177	ABS	B
2018	not published	579.33	577.11	+0%	78 of 153	ABS	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Cruise ships are benchmarked on CO₂ per transport work (pax) (TW), in g CO₂/pax·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 cruise 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.