Navalyze · Container · Ship

ISABELLA B

IMO: 9483358
Type: Container ship
Average cargo carried: 5,171 t
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEXI 22.12 g CO₂/t·nm
Ice class: IA
Former names: CONMAR AVENUE, ISABELLA

ISM company (DoC holder) in 2025: MS Isabella B Schiffahrtsgesellschaft mbH & Co. KG

Report year

2020 at a glance

From the 2020 THETIS-MRV report. Carries about 6,164 t of cargo on average.

Fuel kg/nm

87.9

Container median 172 kg/nm (−49%)

CO₂ per transport work (cargo)

44.7

g CO₂/t·nm · Container median 17.6 (+154%)

Average speed

12.9 kn

Container median 14.0 kn (−8%)

Fuel per day at sea

27.1 t/day

Fuel consumed

5,730 t

CO₂ emitted

17,957 t

Distance sailed

65,203 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,065 h

211 days, 58% 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 79.1 kg/nm · median 177 (−55%)

78.8Ranks 227 of 2,208, lowest first302

Average speedThis ship 11.8 kn · median 13.3 (−11%)

9.1Faster than 29% of container ships16.0

CO₂ per transport work (cargo)This ship 47.8 g CO₂/t·nm · median 16.3 (+193%)

7.22Ranks 1,998 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 ports77%
From the EU7%
Into the EU11%
At berth in the EU5%

Fuel burned laden

–

Not reported

CO₂ at berth

858 t

4.8% 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

ISABELLA B
Container median

50.0100.0150.0200.0

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

Average speed, kn

ISABELLA B
Container median

11.012.013.014.015.0

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

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

ISABELLA B
Container median

10.020.030.040.050.0

’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	−1%	+2%	+11%	+0%	0.3 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2023→2024	−0.8 kn	+5%	−1%	+5%	+6%	0.8 kn slower, fuel per mile up 5%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−0.8 kn	−14%	−19%	+4%	+23%	0.8 kn slower, fuel per mile down 14%; in line with the speed change.
2021→2022	−0.9 kn	−5%	−12%	−16%	−6%	0.9 kn slower, fuel per mile down 5%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+1.1 kn	+5%	+14%	+17%	−13%	1.1 kn faster, fuel per mile up 5%; better than speed alone explains (hull, engine or trade).
2019→2020	+1.9 kn	+1%	+17%	+1%	+20%	1.9 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2018→2019	−0.8 kn	−1%	−7%	−8%	−8%	0.8 kn slower, fuel per mile flat; 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	MS Isabella B Schiffahrtsgesellschaft mbH & Co. KG	6,201	19,347	78,358	6,624	11.8	79.1	47.8	–
2024	MS Isabella B Schiffahrtsgesellschaft mbH & Co. KG	5,609	17,495	70,490	6,113	11.5	79.6	47.6	–
2023	not published	5,067	15,816	67,004	5,460	12.3	75.6	44.9	–
2022	not published	5,644	17,636	64,588	4,938	13.1	87.4	36.7	–
2021	not published	7,054	22,093	76,551	5,460	14.0	92.2	39.1	–
2020	not published	5,730	17,957	65,203	5,065	12.9	87.9	44.7	–
2019	not published	5,642	17,699	64,823	5,874	11.0	87.0	37.3	100%
2018	not published	6,173	19,387	70,317	5,975	11.8	87.8	40.5	100%

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Container median	vs Container	Rank	Verifier	Methods
2025	MS Isabella B Schiffahrtsgesellschaft mbH & Co. KG	47.8	16.3	+193%	1,998 of 2,208	DNV	A
2024	MS Isabella B Schiffahrtsgesellschaft mbH & Co. KG	47.6	17.5	+172%	1,723 of 1,974	DNV	A
2023	not published	44.9	19.4	+132%	1,616 of 1,899	DNV	A
2022	not published	36.7	19.1	+92%	1,427 of 1,825	DNV	A
2021	not published	39.1	17.9	+118%	1,473 of 1,781	Bureau Veritas	A
2020	not published	44.7	17.6	+154%	1,542 of 1,797	Bureau Veritas	A
2019	not published	37.3	18.9	+98%	1,382 of 1,788	Bureau Veritas	A
2018	not published	40.5	20.2	+100%	1,357 of 1,705	Bureau Veritas	A

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.