Navalyze · Vehicle carrier · Ship

SERENITY HIGHWAY

IMO: 9391579
Type: Vehicle carrier
Average cargo carried: 649 t
Port of registry: Nassau
Technical efficiency: EEXI 14.18 g CO₂/t·nm
Former names: SERENITY ACE

ISM company (DoC holder) in 2025: STAMCO SHIP MANAGEMENT CO LTD

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 649 t of cargo on average.

Fuel per mile

185.7 kg/nm

Vehicle carrier median 99.9 kg/nm (+86%)

CO₂ per transport work (cargo)

873

g CO₂/t·nm · Vehicle carrier median 55.36 (+1,476%)

Average speed

5.2 kn

Vehicle carrier median 14.4 kn (−64%)

Fuel per day at sea

23.2 t/day

Fuel consumed

58 t

CO₂ emitted

177 t

180 t CO₂eq incl. CH₄ and N₂O

Distance sailed

313 nm

CO₂ ÷ CO₂ per mile

Time at sea

60 h

3 days, 1% of the year

Within the vehicle carrier fleet, 2025

Set against all 506 vehicle 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 per mileThis ship 185.7 kg/nm · median 99.9 (+86%)

79.6Ranks 505 of 506, lowest first119.0

Average speedThis ship 5.2 kn · median 14.4 (−64%)

12.0Faster than 0% of vehicle carrier ships15.9

CO₂ per transport work (cargo)This ship 872.71 g CO₂/t·nm · median 55.36 (+1,476%)

34.70Ranks 506 of 506, lowest first158.48

Middle 80% of shipsMiddle 50%Vehicle carrier 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 ports0%
From the EU49%
Into the EU44%
At berth in the EU7%

42% of this ship's CO₂ falls under the EU ETS (75 t).

Fuel burned laden

–

Not reported

CO₂ at berth

7.1%

Alongside in EU ports

Methane (CH₄)

0.0 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.017

Uplift from CH₄ and N₂O, counted in full from 2026

Over the years

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

Fuel per mile, kg/nm

SERENITY HIGHWAY
Vehicle carrier median

75.0100.0125.0150.0175.0200.0

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

Average speed, kn

SERENITY HIGHWAY
Vehicle carrier median

5.07.510.012.515.0

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

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

SERENITY HIGHWAY
Vehicle carrier median

0.02505007501,000

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	−7.3 kn	+89%	−21%	−96%	+1,129%	7.3 kn slower, fuel per mile up 89%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+0.6 kn	−5%	+0%	−42%	+28%	0.6 kn faster, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2022→2023	−2.2 kn	−21%	−33%	−9%	−75%	2.2 kn slower, fuel per mile down 21%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.5 kn	+12%	+7%	−49%	+293%	0.5 kn slower, fuel per mile up 12%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+2.5 kn	+5%	+26%	−5%	+6%	2.5 kn faster, fuel per mile up 5%; better than speed alone explains (hull, engine or trade).
2019→2020	−1.4 kn	−5%	−14%	+28%	−7%	1.4 kn slower, fuel per mile down 5%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	−1.0 kn	−24%	−30%	+44%	−20%	1.0 kn slower, fuel per mile down 24%; 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	STAMCO SHIP MANAGEMENT CO LTD	58	177	313	60	5.2	185.7	872.71	–
2024	STAMCO SHIP MANAGEMENT CO LTD	842	2,669	8,568	686	12.5	98.3	70.99	–
2023	not published	1,520	4,752	14,767	1,243	11.9	103.0	55.66	–
2022	not published	2,117	6,685	16,273	1,158	14.1	130.1	219.19	–
2021	not published	3,692	11,666	31,656	2,168	14.6	116.6	55.84	–
2020	not published	3,692	11,700	33,154	2,729	12.1	111.4	52.67	–
2019	not published	3,032	9,514	25,831	1,920	13.5	117.4	56.82	–
2018	not published	2,782	8,724	17,926	1,235	14.5	155.2	71.19	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Vehicle carrier median	vs Vehicle carrier	Rank	Verifier	Methods
2025	STAMCO SHIP MANAGEMENT CO LTD	872.71	55.36	+1,476%	506 of 506	DNV	A
2024	STAMCO SHIP MANAGEMENT CO LTD	70.99	55.31	+28%	230 of 335	DNV	A
2023	not published	55.66	56.64	−2%	203 of 417	DNV	A
2022	not published	219.19	57.66	+280%	446 of 463	DNV	A
2021	not published	55.84	59.57	−6%	196 of 459	DNV	A
2020	not published	52.67	57.26	−8%	185 of 449	DNV	A
2019	not published	56.82	58.95	−4%	201 of 426	DNV	A
2018	not published	71.19	62.35	+14%	279 of 434	DNV	A

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