Navalyze · Container · Ship

ONE WREN

IMO: 9784776
Type: Container ship
Average cargo carried: 116,573 t
Flag (estimated): Japan
Port of registry: Tokyo
Technical efficiency: EEDI 5.94 g CO₂/t·nm
Former names: NYK WREN

Report year

2020 at a glance

From the 2020 THETIS-MRV report. Carries about 120,858 t of cargo on average.

Fuel kg/nm

238

Container median 172 kg/nm (+38%)

CO₂ per transport work (cargo)

6.20

g CO₂/t·nm · Container median 17.6 (−65%)

Average speed

15.4 kn

Container median 14.0 kn (+10%)

Fuel per day at sea

88.0 t/day

Fuel consumed

10,507 t

CO₂ emitted

33,118 t

Distance sailed

44,198 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,866 h

119 days, 33% of the year

Within the container fleet, 2021

Set against all 1,781 container ships with a full-year 2021 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 240 kg/nm · median 186 (+29%)

80.1Ranks 1,163 of 1,781, lowest first325

Average speedThis ship 11.3 kn · median 14.1 (−20%)

10.7Faster than 15% of container ships16.9

CO₂ per transport work (cargo)This ship 6.47 g CO₂/t·nm · median 17.9 (−64%)

7.81Ranks 98 of 1,781, lowest first50.0

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 ports7%
From the EU29%
Into the EU60%
At berth in the EU4%

Fuel burned laden

–

Not reported

CO₂ at berth

1,275 t

3.9% 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

ONE WREN
Container median

150.0175.0200.0225.0250.0275.0

’182018’192019’202020’212021

Average speed, kn

ONE WREN
Container median

10.012.014.016.018.0

’182018’192019’202020’212021

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

ONE WREN
Container median

5.010.015.020.025.0

’182018’192019’202020’212021

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2020→2021	−4.1 kn	+1%	−26%	−80%	+4%	4.1 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	−0.6 kn	−6%	−10%	+2%	−7%	0.6 kn slower, fuel per mile down 6%; in line with the speed change.
2018→2019	−1.0 kn	+18%	+11%	+131%	−2%	1.0 kn slower, fuel per mile up 18%; 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
2021	not published	2,077	6,517	8,641	768	11.3	240	6.47	–
2020	not published	10,507	33,118	44,198	2,866	15.4	238	6.20	–
2019	not published	10,998	34,316	43,463	2,713	16.0	253	6.68	–
2018	not published	4,024	12,531	18,814	1,106	17.0	214	6.85	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Container median	vs Container	Rank	Verifier	Methods
2021	not published	6.47	17.9	−64%	98 of 1,781	ClassNK	C
2020	not published	6.20	17.6	−65%	92 of 1,797	ClassNK	C
2019	not published	6.68	18.9	−65%	91 of 1,788	ClassNK	C
2018	not published	6.85	20.2	−66%	48 of 1,705	ClassNK	C

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.