Navalyze · Bulk carrier · Ship

HOUSTON HARMONY

IMO: 9845984
Type: Bulk carrier
Average cargo carried: 27,169 t
Port of registry: Panama
Technical efficiency: EEDI 5.33 g CO₂/t·nm

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 27,169 t of cargo on average.

Fuel per mile

61.5 kg/nm

Bulk carrier median 86.1 kg/nm (−29%)

CO₂ per transport work (cargo)

7.15

g CO₂/t·nm · Bulk carrier median 8.27 (−14%)

Average speed

10.9 kn

Bulk carrier median 10.8 kn (+1%)

Fuel per day at sea

16.1 t/day

Fuel consumed

920 t

CO₂ emitted

2,904 t

Distance sailed

14,951 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,373 h

57 days, 16% of the year

Within the bulk carrier fleet, 2023

Set against all 3,548 bulk carrier ships with a full-year 2023 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 61.5 kg/nm · median 86.1 (−29%)

63.6Ranks 280 of 3,548, lowest first124.7

Average speedThis ship 10.9 kn · median 10.8 (+1%)

8.8Faster than 54% of bulk carrier ships12.0

CO₂ per transport work (cargo)This ship 7.15 g CO₂/t·nm · median 8.27 (−14%)

4.85Ranks 1,274 of 3,548, lowest first17.36

Middle 80% of shipsMiddle 50%Bulk carrier medianThis ship

Where the emissions happen, 2023

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 ports4%
From the EU24%
Into the EU71%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

1.7%

Alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

–

Uplift from CH₄ and N₂O, counted in full from 2026

Over the years

Full-year reports only. The Bulk carrier median is the middle ship of all bulk 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

HOUSTON HARMONY
Bulk carrier median

60.070.080.090.0100.0

’192019’202020’212021’232023

Average speed, kn

HOUSTON HARMONY
Bulk carrier median

10.010.511.011.512.0

’192019’202020’212021’232023

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

HOUSTON HARMONY
Bulk carrier median

7.07.58.08.59.0

’192019’212021’232023

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2021→2023	−0.9 kn	−16%	−23%	−14%	−7%	0.9 kn slower, fuel per mile down 16%; in line with the speed change.
2020→2021	+0.6 kn	+8%	+13%	+2,138%	–	0.6 kn faster, fuel per mile up 8%; in line with the speed change.
2019→2020	+0.8 kn	−8%	−1%	−97%	–	0.8 kn faster, fuel per mile down 8%; 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
2023	not published	920	2,904	14,951	1,373	10.9	61.5	7.15	–
2021	not published	1,279	4,040	17,408	1,479	11.8	73.5	7.69	–
2020	not published	53	165	778	69	11.2	68.2	–	–
2019	not published	2,165	6,760	29,091	2,792	10.4	74.4	7.73	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Bulk carrier median	vs Bulk carrier	Rank	Verifier	Methods
2023	not published	7.15	8.27	−14%	1,274 of 3,548	ClassNK	C
2021	not published	7.69	8.57	−10%	1,307 of 3,466	ClassNK	C
2020	not published	–	–	–	–	ClassNK	C
2019	not published	7.73	8.38	−8%	1,411 of 3,360	ClassNK	C

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