Navalyze · Vehicle carrier · Ship

GREEN BAY

IMO: 9339818
Type: Vehicle carrier
Average cargo carried: 4,029 t
Flag (estimated): United States
Port of registry: Mobile, Al
Technical efficiency: EEXI 15.20 g CO₂/t·nm

ISM company (DoC holder) in 2025: Seabulk Fleet Management LLC

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 4,519 t of cargo on average.

Fuel kg/nm

91.8

Vehicle carrier median 104 kg/nm (−12%)

CO₂ per transport work (cargo)

63.6

g CO₂/t·nm · Vehicle carrier median 62.4 (+2%)

Average speed

14.8 kn

Vehicle carrier median 14.7 kn (+1%)

Fuel per day at sea

32.7 t/day

Fuel consumed

644 t

CO₂ emitted

2,017 t

Distance sailed

7,017 nm

CO₂ ÷ CO₂ per mile

Time at sea

473 h

20 days, 5% 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 kg/nmThis ship 86.0 kg/nm · median 99.9 (−14%)

79.6Ranks 87 of 506, lowest first119

Average speedThis ship 14.6 kn · median 14.4 (+1%)

12.0Faster than 56% of vehicle carrier ships15.9

CO₂ per transport work (cargo)This ship 67.1 g CO₂/t·nm · median 55.4 (+21%)

34.7Ranks 321 of 506, lowest first158

Middle 80% of shipsMiddle 50%Vehicle carrier 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 ports35%
From the EU15%
Into the EU48%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

42 t

2.1% 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 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 kg/nm

GREEN BAY
Vehicle carrier median

80.090.0100.0110.0120.0130.0

’182018’192019’202020’212021’252025

Average speed, kn

GREEN BAY
Vehicle carrier median

13.014.015.016.0

’182018’192019’202020’212021’252025

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

GREEN BAY
Vehicle carrier median

50.055.060.065.070.0

’182018’192019’202020’212021’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2021→2025	+1.0 kn	−21%	−16%	+191%	+30%	1.0 kn faster, fuel per mile down 21%; better than speed alone explains (hull, engine or trade).
2020→2021	−0.1 kn	+11%	+10%	−80%	−24%	Same speed, fuel per mile up 11%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	−2.0 kn	−21%	−31%	+8,853%	+22%	2.0 kn slower, fuel per mile down 21%; in line with the speed change.
2018→2019	+0.9 kn	+36%	+44%	−91%	−13%	0.9 kn faster, fuel per mile up 36%; worse than speed alone explains (fouling, weather, loading 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	Seabulk Fleet Management LLC	0	0	–	0	–	–	–	–
2025	US Ocean Fleet Management	2,917	9,165	33,915	2,323	14.6	86.0	67.1	–
2021	not published	1,275	4,038	11,670	857	13.6	109	51.4	88%
2020	not published	5,689	17,984	57,746	4,212	13.7	98.5	67.9	–
2019	not published	80	254	645	41	15.7	125	55.5	–
2018	not published	644	2,017	7,017	473	14.8	91.8	63.6	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Vehicle carrier median	vs Vehicle carrier	Rank	Verifier	Methods
2025part-year	Seabulk Fleet Management LLC	–	–	–	–	DNV	A+C
2025	US Ocean Fleet Management	67.1	55.4	+21%	321 of 506	DNV	B+C
2021	not published	51.4	59.6	−14%	151 of 459	ABS	–
2020	not published	67.9	57.3	+19%	295 of 449	ABS	–
2019	not published	55.5	59.0	−6%	185 of 426	ABS	–
2018	not published	63.6	62.4	+2%	234 of 434	ABS	B

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.