Navalyze · Oil tanker · Ship

DAS

IMO: 9439802
Type: Oil tanker
Average cargo carried: 36,029 t
Port of registry: Majuro
Technical efficiency: EIV 6.68 g CO₂/t·nm
Former names: RIDGEBURY ROSEMARY E

ISM company (DoC holder) in 2025: FLEET MANAGEMENT LIMITED

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 36,029 t of cargo on average.

Fuel per mile

87.9 kg/nm

Oil tanker median 128.5 kg/nm (−32%)

CO₂ per transport work (cargo)

7.68

g CO₂/t·nm · Oil tanker median 7.95 (−3%)

Average speed

12.0 kn

Oil tanker median 10.7 kn (+12%)

Fuel per day at sea

25.3 t/day

Fuel consumed

1,995 t

CO₂ emitted

6,279 t

6,377 t CO₂eq incl. CH₄ and N₂O

Distance sailed

22,693 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,895 h

79 days, 22% of the year

Within the oil tanker fleet, 2025

Set against all 1,665 oil tanker 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 87.9 kg/nm · median 128.5 (−32%)

76.1Ranks 291 of 1,665, lowest first190.8

Average speedThis ship 12.0 kn · median 10.7 (+12%)

8.0Faster than 87% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 7.68 g CO₂/t·nm · median 7.95 (−3%)

4.51Ranks 778 of 1,665, lowest first27.66

Middle 80% of shipsMiddle 50%Oil tanker 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 ports15%
From the EU23%
Into the EU58%
At berth in the EU3%

59% of this ship's CO₂ falls under the EU ETS (3,731 t).

Fuel burned laden

–

Not reported

CO₂ at berth

3.4%

Alongside in EU ports

Methane (CH₄)

0.1 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 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

DAS
Oil tanker median

50.0100.0150.0200.0250.0300.0

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

Average speed, kn

DAS
Oil tanker median

6.08.010.012.014.0

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

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

DAS
Oil tanker median

5.010.015.020.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+1.1 kn	−13%	−4%	+269%	−61%	1.1 kn faster, fuel per mile down 13%; better than speed alone explains (hull, engine or trade).
2023→2024	+3.0 kn	−63%	−50%	+402%	–	3.0 kn faster, fuel per mile down 63%; better than speed alone explains (hull, engine or trade).
2021→2023	−5.0 kn	+206%	+89%	−95%	–	5.0 kn slower, fuel per mile up 206%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.0 kn	+9%	+9%	+15%	+2%	Same speed, fuel per mile up 9%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	−0.9 kn	−10%	−16%	+233%	−33%	0.9 kn slower, fuel per mile down 10%; in line with the speed change.
2018→2019	+4.6 kn	+2%	+52%	−66%	+33%	4.6 kn faster, fuel per mile up 2%; better than speed alone explains (hull, engine 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	FLEET MANAGEMENT LIMITED	1,995	6,279	22,693	1,895	12.0	87.9	7.68	–
2024	FLEET MANAGEMENT LIMITED	619	1,962	6,153	562	10.9	100.6	19.77	–
2023	not published	337	1,066	1,225	154	7.9	275.3	990.47	–
2021	not published	2,080	6,579	23,119	1,798	12.9	90.0	9.15	–
2020	not published	1,661	5,214	20,067	1,560	12.9	82.8	9.00	–
2019	not published	555	1,744	6,026	438	13.8	92.2	13.38	–
2018	not published	1,595	5,023	17,725	1,917	9.2	90.0	10.06	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	FLEET MANAGEMENT LIMITED	7.68	7.95	−3%	778 of 1,665	ClassNK	B+C
2024	FLEET MANAGEMENT LIMITED	19.77	8.06	+145%	1,523 of 1,787	ClassNK	C
2023	not published	–	–	–	–	ClassNK	C
2021	not published	9.15	8.86	+3%	939 of 1,789	ClassNK	C
2020	not published	9.00	9.03	−0%	931 of 1,870	ClassNK	C
2019	not published	13.38	8.83	+52%	1,424 of 1,919	ClassNK	C
2018	not published	10.06	17.14	−41%	177 of 1,294	Lloyd's Register	B

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.