Navalyze · Container · Ship

MARY MAERSK

IMO: 9619921
Type: Container ship
Average cargo carried: 146,981 t
Flag (estimated): Denmark
Port of registry: Svendborg
Technical efficiency: EEXI 6.77 g CO₂/t·nm

ISM company (DoC holder) in 2025: Maersk A/S · part of Maersk

Report year

2020 at a glance

From the 2020 THETIS-MRV report. Carries about 152,410 t of cargo on average.

Fuel kg/nm

340

Container median 172 kg/nm (+98%)

CO₂ per transport work (cargo)

6.80

g CO₂/t·nm · Container median 17.6 (−61%)

Average speed

16.4 kn

Container median 14.0 kn (+17%)

Fuel per day at sea

133.6 t/day

Fuel consumed

19,070 t

CO₂ emitted

58,090 t

Distance sailed

56,050 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,425 h

143 days, 39% of the year

Within the container fleet, 2025

Set against all 2,208 container 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 317 kg/nm · median 177 (+79%)

78.8Ranks 2,056 of 2,208, lowest first302

Average speedThis ship 15.9 kn · median 13.3 (+20%)

9.1Faster than 88% of container ships16.0

CO₂ per transport work (cargo)This ship 6.71 g CO₂/t·nm · median 16.3 (−59%)

7.22Ranks 155 of 2,208, lowest first46.9

Middle 80% of shipsMiddle 50%Container 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 ports19%
From the EU46%
Into the EU33%
At berth in the EU2%

Fuel burned laden

19,070 t

100% of all fuel; 0% in ballast or unladen

CO₂ at berth

1,295 t

2.2% 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 Container median is the middle ship of all container ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

MARY MAERSK
Container median

150.0200.0250.0300.0350.0

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

Average speed, kn

MARY MAERSK
Container median

12.014.016.018.0

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

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

MARY MAERSK
Container median

5.010.015.020.025.0

’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%	−29%	+11%	0.3 kn faster, fuel per mile down 2%; better than speed alone explains (hull, engine or trade).
2023→2024	+1.1 kn	+12%	+20%	+81%	−2%	1.1 kn faster, fuel per mile up 12%; in line with the speed change.
2022→2023	+2.4 kn	−12%	+5%	−38%	−15%	2.4 kn faster, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2021→2022	−3.6 kn	−1%	−23%	−10%	+16%	3.6 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−0.7 kn	−2%	−6%	+36%	−8%	0.7 kn slower, fuel per mile down 2%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+1.9 kn	+6%	+19%	+124%	−2%	1.9 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine or trade).
2018→2019	−2.9 kn	−7%	−22%	−49%	−5%	2.9 kn slower, fuel per mile down 7%; 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	Maersk A/S	17,286	53,831	54,582	3,435	15.9	317	6.71	98%
2024	Maersk A/S	25,007	77,919	77,345	4,946	15.6	323	6.02	99%
2023	not published	12,373	38,532	42,722	2,937	14.5	290	6.16	98%
2022	not published	22,857	71,210	69,146	5,691	12.1	331	7.24	98%
2021	not published	25,408	79,135	76,417	4,874	15.7	333	6.26	–
2020	not published	19,070	58,090	56,050	3,425	16.4	340	6.80	100%
2019	not published	8,047	25,068	25,069	1,727	14.5	321	6.96	100%
2018	not published	16,822	52,537	48,946	2,810	17.4	344	7.36	100%

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Container median	vs Container	Rank	Verifier	Methods
2025	Maersk A/S	6.71	16.3	−59%	155 of 2,208	ABS	C
2024	Maersk A/S	6.02	17.5	−66%	67 of 1,974	ABS	C
2023	not published	6.16	19.4	−68%	74 of 1,899	ABS	C
2022	not published	7.24	19.1	−62%	159 of 1,825	ABS	C
2021	not published	6.26	17.9	−65%	80 of 1,781	ABS	C
2020	not published	6.80	17.6	−61%	151 of 1,797	ABS	C
2019	not published	6.96	18.9	−63%	113 of 1,788	ABS	C
2018	not published	7.36	20.2	−64%	87 of 1,705	ABS	C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Container 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 container 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.