Navalyze · Container · Ship

CALYPSO

IMO: 9550371
Type: Container ship
Average cargo carried: 9,567 t
Flag (estimated): Liberia
Port of registry: Monrovia
Technical efficiency: EEXI 18.80 g CO₂/t·nm

ISM company (DoC holder) in 2025: GOLDENPORT SHIPMANAGEMENT LTD.

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 9,567 t of cargo on average.

Fuel kg/nm

91.0

Container median 177 kg/nm (−49%)

CO₂ per transport work (cargo)

29.8

g CO₂/t·nm · Container median 16.3 (+83%)

Average speed

9.8 kn

Container median 13.3 kn (−26%)

Fuel per day at sea

21.3 t/day

Fuel consumed

2,877 t

CO₂ emitted

9,008 t

9,149 t CO₂eq incl. CH₄ and N₂O

Distance sailed

31,629 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,235 h

135 days, 37% 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 91.0 kg/nm · median 177 (−49%)

78.8Ranks 415 of 2,208, lowest first302

Average speedThis ship 9.8 kn · median 13.3 (−26%)

9.1Faster than 14% of container ships16.0

CO₂ per transport work (cargo)This ship 29.8 g CO₂/t·nm · median 16.3 (+83%)

7.22Ranks 1,676 of 2,208, lowest first46.9

Middle 80% of shipsMiddle 50%Container 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 ports7%
From the EU55%
Into the EU36%
At berth in the EU2%

47% of this ship's CO₂ falls under the EU ETS (4,207 t).

Fuel burned laden

–

Not reported

CO₂ at berth

160 t

1.8% 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

+141 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 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

CALYPSO
Container median

75.0100.0125.0150.0175.0200.0

’212021’222022’232023’242024’252025

Average speed, kn

CALYPSO
Container median

6.08.010.012.014.016.0

’212021’222022’232023’242024’252025

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

CALYPSO
Container median

10.020.030.040.050.0

’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	−0.6 kn	+1%	−4%	+29%	+17%	0.6 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+2.6 kn	+3%	+38%	+66%	−48%	2.6 kn faster, fuel per mile up 3%; better than speed alone explains (hull, engine or trade).
2022→2023	−5.8 kn	−5%	−45%	−34%	+47%	5.8 kn slower, fuel per mile down 5%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.4 kn	−8%	−10%	+110%	+62%	0.4 kn slower, fuel per mile down 8%; in line with the speed change.

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	GOLDENPORT SHIPMANAGEMENT LTD.	2,877	9,008	31,629	3,235	9.8	91.0	29.8	–
2024	GOLDENPORT SHIPMANAGEMENT LTD.	2,199	6,855	24,514	2,364	10.4	89.7	25.4	–
2023	not published	1,280	3,995	14,766	1,899	7.8	86.7	49.2	–
2022	not published	2,030	6,332	22,312	1,638	13.6	91.0	33.4	–
2021	not published	1,050	3,312	10,610	760	14.0	99.0	20.7	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Container median	vs Container	Rank	Verifier	Methods
2025	GOLDENPORT SHIPMANAGEMENT LTD.	29.8	16.3	+83%	1,676 of 2,208	DNV	B
2024	GOLDENPORT SHIPMANAGEMENT LTD.	25.4	17.5	+45%	1,338 of 1,974	DNV	B
2023	not published	49.2	19.4	+154%	1,671 of 1,899	DNV	B
2022	not published	33.4	19.1	+75%	1,369 of 1,825	DNV	B
2021	not published	20.7	17.9	+15%	1,028 of 1,781	DNV	B

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.