Navalyze · Chemical tanker · Ship

BOTHNIA

IMO: 9485356
Type: Chemical tanker
Average cargo carried: 3,566 t
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEXI 11.34 g CO₂/t·nm
Ice class: IA

ISM company (DoC holder) in 2025: South End Tanker Management B.V.

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 4,218 t of cargo on average.

Fuel kg/nm

54.9

Chemical tanker median 90.2 kg/nm (−39%)

CO₂ per transport work (cargo)

41.4

g CO₂/t·nm · Chemical tanker median 17.1 (+141%)

Average speed

9.4 kn

Chemical tanker median 10.1 kn (−7%)

Fuel per day at sea

12.4 t/day

Fuel consumed

3,206 t

CO₂ emitted

10,190 t

Distance sailed

58,382 nm

CO₂ ÷ CO₂ per mile

Time at sea

6,213 h

259 days, 71% of the year

Within the chemical tanker fleet, 2025

Set against all 1,460 chemical 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 kg/nmThis ship 61.2 kg/nm · median 79.7 (−23%)

52.8Ranks 276 of 1,460, lowest first111

Average speedThis ship 10.8 kn · median 11.1 (−3%)

8.8Faster than 40% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 54.7 g CO₂/t·nm · median 15.0 (+263%)

7.93Ranks 1,407 of 1,460, lowest first40.2

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2018

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 ports69%
From the EU10%
Into the EU14%
At berth in the EU7%

Fuel burned laden

–

Not reported

CO₂ at berth

719 t

7.1% 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 Chemical tanker median is the middle ship of all chemical tanker ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

BOTHNIA
Chemical tanker median

50.060.070.080.090.0100.0

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

Average speed, kn

BOTHNIA
Chemical tanker median

9.010.011.012.0

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

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

BOTHNIA
Chemical tanker median

10.020.030.040.050.060.0

’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	+6%	+8%	−4%	+3%	0.3 kn faster, fuel per mile up 6%; in line with the speed change.
2023→2024	−0.7 kn	−1%	−7%	+1%	+7%	0.7 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−0.6 kn	+12%	+7%	−31%	+15%	0.6 kn slower, fuel per mile up 12%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.7 kn	−9%	−4%	+35%	−4%	0.7 kn faster, fuel per mile down 9%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.4 kn	−2%	+2%	−14%	−17%	0.4 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2019→2020	+0.2 kn	+13%	+16%	−12%	+39%	Same speed, fuel per mile up 13%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	+1.1 kn	−6%	+4%	−5%	−4%	1.1 kn faster, fuel per mile down 6%; better than speed alone explains (hull, engine or trade).

Part-year reports are left out of these comparisons. 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
2025part-year	South End Tanker Management B.V.	263	843	3,913	370	10.6	67.2	61.2	–
2025	Clearwater Ship Management B.V.	2,322	7,401	37,963	3,523	10.8	61.2	54.7	–
2024	South End Tanker Management B.V.	2,295	7,358	39,597	3,761	10.5	58.0	53.3	–
2023	not published	2,278	7,305	39,038	3,475	11.2	58.4	49.9	–
2022	not published	2,958	9,482	56,803	4,816	11.8	52.1	43.4	–
2021	not published	2,408	7,718	42,101	3,785	11.1	57.2	45.5	–
2020	not published	2,853	9,145	48,990	4,558	10.7	58.2	54.8	–
2019	not published	2,846	9,100	55,408	5,293	10.5	51.4	39.6	–
2018	not published	3,206	10,190	58,382	6,213	9.4	54.9	41.4	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025part-year	South End Tanker Management B.V.	–	–	–	–	DNV	A+C
2025	Clearwater Ship Management B.V.	54.7	15.0	+263%	1,407 of 1,460	DNV	A+B+C
2024	South End Tanker Management B.V.	53.3	16.7	+219%	1,209 of 1,274	DNV	A+C
2023	not published	49.9	16.2	+207%	1,233 of 1,314	DNV	A+C
2022	not published	43.4	16.1	+170%	1,303 of 1,409	DNV	A+C
2021	not published	45.5	16.7	+172%	1,242 of 1,343	DNV	A+C
2020	not published	54.8	16.2	+239%	1,267 of 1,312	DNV	A+C
2019	not published	39.6	17.3	+128%	1,155 of 1,321	DNV	A+C
2018	not published	41.4	17.1	+141%	1,140 of 1,294	DNV	A+C

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