Navalyze · Oil tanker · Ship

MAERSK MARU

IMO: 9581447
Type: Oil tanker
Average cargo carried: 24,569 t
Port of registry: Singapore
Technical efficiency: EEXI 5.06 g CO₂/t·nm
Former names: FIDELITY II

ISM company (DoC holder) in 2024: SYNERGY DENMARK A/S · part of Synergy Marine

Report year

2024 at a glance

From the 2024 THETIS-MRV report. Carries about 24,569 t of cargo on average.

Fuel per mile

90.7 kg/nm

Oil tanker median 129.0 kg/nm (−30%)

CO₂ per transport work (cargo)

11.58

g CO₂/t·nm · Oil tanker median 8.06 (+44%)

Average speed

11.4 kn

Oil tanker median 10.9 kn (+5%)

Fuel per day at sea

24.8 t/day

Fuel consumed

989 t

CO₂ emitted

3,102 t

3,150 t CO₂eq incl. CH₄ and N₂O

Distance sailed

10,902 nm

CO₂ ÷ CO₂ per mile

Time at sea

958 h

40 days, 11% of the year

Within the oil tanker fleet, 2024

Set against all 1,787 oil tanker ships with a full-year 2024 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 90.7 kg/nm · median 129.0 (−30%)

79.5Ranks 334 of 1,787, lowest first193.6

Average speedThis ship 11.4 kn · median 10.9 (+5%)

8.1Faster than 65% of oil tanker ships12.3

CO₂ per transport work (cargo)This ship 11.58 g CO₂/t·nm · median 8.06 (+44%)

4.44Ranks 1,287 of 1,787, lowest first25.70

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2024

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 ports2%
From the EU66%
Into the EU29%
At berth in the EU3%

53% of this ship's CO₂ falls under the EU ETS (1,629 t).

Fuel burned laden

66%

34% in ballast or unladen

CO₂ at berth

3.5%

Alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.015

Uplift from CH₄ and N₂O, counted in full from 2026

Over the years

Full-year reports only. The Oil tanker median is the middle ship of all oil tanker ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel per mile, kg/nm

MAERSK MARU
Oil tanker median

80.0100.0120.0140.0

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

Average speed, kn

MAERSK MARU
Oil tanker median

6.08.010.012.014.0

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

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

MAERSK MARU
Oil tanker median

8.010.012.014.016.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2023→2024	+0.3 kn	−13%	−11%	−35%	+31%	0.3 kn faster, fuel per mile down 13%; better than speed alone explains (hull, engine or trade).
2022→2023	−1.0 kn	+10%	+1%	+4%	−29%	1.0 kn slower, fuel per mile up 10%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.2 kn	−7%	−5%	−38%	+15%	Same speed, fuel per mile down 7%; better than speed alone explains (hull, engine or trade).
2020→2021	−1.3 kn	−24%	−32%	+892%	−27%	1.3 kn slower, fuel per mile down 24%; better than speed alone explains (hull, engine or trade).
2019→2020	+6.6 kn	+32%	+165%	−91%	+16%	6.6 kn faster, fuel per mile up 32%; better than speed alone explains (hull, engine or trade).
2018→2019	−3.1 kn	+4%	−30%	−28%	−14%	3.1 kn slower, fuel per mile up 4%; 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
2024	SYNERGY DENMARK A/S	989	3,102	10,902	958	11.4	90.7	11.58	66%
2023	not published	1,759	5,528	16,881	1,517	11.1	104.2	8.82	86%
2022	not published	1,542	4,835	16,220	1,343	12.1	95.0	12.47	60%
2021	not published	2,667	8,387	26,199	2,197	11.9	101.8	10.80	–
2020	not published	356	1,120	2,642	200	13.2	134.6	14.74	–
2019	not published	2,908	9,068	28,476	4,322	6.6	102.1	12.69	–
2018	not published	3,897	12,249	39,694	4,087	9.7	98.2	14.72	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2024	SYNERGY DENMARK A/S	11.58	8.06	+44%	1,287 of 1,787	ABS	A+C
2023	not published	8.82	8.44	+5%	961 of 1,797	ABS	–
2022	not published	12.47	8.51	+47%	1,416 of 1,961	ABS	C
2021	not published	10.80	8.86	+22%	1,136 of 1,789	ABS	C
2020	not published	14.74	9.03	+63%	1,412 of 1,870	ABS	C
2019	not published	12.69	8.83	+44%	1,384 of 1,919	ABS	C
2018	not published	14.72	8.86	+66%	1,379 of 1,779	ClassNK	C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Oil tanker 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 oil tanker 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.