Navalyze · Bulk carrier · Ship

RB LEAH

IMO: 9730830
Type: Bulk carrier
Average cargo carried: 46,124 t
Flag (estimated): Marshall Islands
Port of registry: Majuro
Technical efficiency: EEDI 3.25 g CO₂/t·nm

ISM company (DoC holder) in 2025: RUBICON MARITIME (UK) LIMITED

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 46,124 t of cargo on average.

Fuel kg/nm

89.8

Bulk carrier median 82.6 kg/nm (+9%)

CO₂ per transport work (cargo)

6.11

g CO₂/t·nm · Bulk carrier median 7.90 (−23%)

Average speed

9.8 kn

Bulk carrier median 10.7 kn (−8%)

Fuel per day at sea

21.1 t/day

Fuel consumed

2,317 t

CO₂ emitted

7,269 t

7,383 t CO₂eq incl. CH₄ and N₂O

Distance sailed

25,794 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,640 h

110 days, 30% of the year

Within the bulk carrier fleet, 2025

Set against all 3,611 bulk carrier 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 89.8 kg/nm · median 82.6 (+9%)

61.0Ranks 2,354 of 3,611, lowest first114

Average speedThis ship 9.8 kn · median 10.7 (−8%)

8.8Faster than 22% of bulk carrier ships11.8

CO₂ per transport work (cargo)This ship 6.11 g CO₂/t·nm · median 7.90 (−23%)

4.80Ranks 928 of 3,611, lowest first15.9

Middle 80% of shipsMiddle 50%Bulk carrier medianThis ship

Where the emissions happen, 2025

THETIS splits each ship's emissions 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 ports0%
From the EU33%
Into the EU65%
At berth in the EU3%

51% of this ship's CO₂ falls under the EU ETS (3,737 t).

Fuel burned laden

–

Not reported

CO₂ at berth

204 t

2.8% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+114 t

+1.6% CO₂eq on top of CO₂ alone, from CH₄ and N₂O; counted in full from 2026

Over the years

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

Fuel kg/nm

RB LEAH
Bulk carrier median

70.080.090.0100.0110.0

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

Average speed, kn

RB LEAH
Bulk carrier median

8.09.010.011.012.013.0

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

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

RB LEAH
Bulk carrier median

0.05.010.015.0

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

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%	−5%	+83%	–	Same speed, fuel per mile down 2%; in line with the speed change.
2023→2024	−1.7 kn	+22%	+5%	−12%	–	1.7 kn slower, fuel per mile up 22%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.7 kn	−15%	−10%	+19%	+99%	0.7 kn faster, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2021→2022	−1.0 kn	−20%	−26%	+116%	−30%	1.0 kn slower, fuel per mile down 20%; in line with the speed change.
2020→2021	+0.7 kn	+30%	+39%	−53%	−61%	0.7 kn faster, fuel per mile up 30%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+2.9 kn	−18%	+10%	−32%	+138%	2.9 kn faster, fuel per mile down 18%; better than speed alone explains (hull, engine or trade).
2018→2019	−2.8 kn	+19%	−11%	+153%	−42%	2.8 kn slower, fuel per mile up 19%; 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	RUBICON MARITIME (UK) LIMITED	2,317	7,269	25,794	2,640	9.8	89.8	6.11	–
2024	RB BRITISH MARINE (UK) LIMITED	1,297	4,048	14,085	1,397	10.1	92.1	–	–
2023	not published	1,205	3,774	16,013	1,361	11.8	75.3	7.65	–
2022	not published	1,191	3,740	13,494	1,212	11.1	88.2	3.85	–
2021	not published	687	2,159	6,259	518	12.1	110	5.53	–
2020	not published	1,127	3,524	13,396	1,180	11.4	84.2	14.3	33%
2019	not published	2,029	6,380	19,769	2,330	8.5	103	6.02	78%
2018	not published	677	2,118	7,828	696	11.3	86.5	10.3	4%

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Bulk carrier median	vs Bulk carrier	Rank	Verifier	Methods
2025	RUBICON MARITIME (UK) LIMITED	6.11	7.90	−23%	928 of 3,611	ClassNK	A
2024	RB BRITISH MARINE (UK) LIMITED	–	–	–	–	ClassNK	A
2023	not published	7.65	8.27	−7%	1,508 of 3,548	ClassNK	A
2022	not published	3.85	8.71	−56%	135 of 3,968	ClassNK	A
2021	not published	5.53	8.57	−35%	426 of 3,466	ClassNK	A
2020	not published	14.3	8.24	+74%	2,813 of 3,150	Lloyd's Register	C
2019	not published	6.02	8.38	−28%	682 of 3,360	Lloyd's Register	C
2018	not published	10.3	8.50	+21%	2,335 of 3,384	Lloyd's Register	–

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Bulk carrier 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 bulk carrier 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.