Navalyze · Bulk carrier · Ship

STAR SIENNA

IMO: 9756224
Type: Bulk carrier
Average cargo carried: 169,478 t
Flag (estimated): Cayman Islands
Port of registry: George Town
Technical efficiency: EEDI 2.36 g CO₂/t·nm

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 150,446 t of cargo on average.

Fuel kg/nm

168

Bulk carrier median 92.4 kg/nm (+82%)

CO₂ per transport work (cargo)

3.50

g CO₂/t·nm · Bulk carrier median 8.50 (−59%)

Average speed

7.8 kn

Bulk carrier median 10.4 kn (−25%)

Fuel per day at sea

31.6 t/day

Fuel consumed

3,805 t

CO₂ emitted

11,931 t

Distance sailed

22,659 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,894 h

121 days, 33% of the year

Within the bulk carrier fleet, 2019

Set against all 3,360 bulk carrier ships with a full-year 2019 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 225 kg/nm · median 91.2 (+146%)

67.0Ranks 3,347 of 3,360, lowest first135

Average speedThis ship 6.3 kn · median 10.3 (−39%)

7.4Faster than 4% of bulk carrier ships12.0

CO₂ per transport work (cargo)This ship 4.14 g CO₂/t·nm · median 8.38 (−51%)

4.89Ranks 185 of 3,360, lowest first15.5

Middle 80% of shipsMiddle 50%Bulk 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 ports16%
From the EU41%
Into the EU38%
At berth in the EU5%

Fuel burned laden

–

Not reported

CO₂ at berth

573 t

4.8% 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 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 kg/nm

STAR SIENNA
Bulk carrier median

50.0100.0150.0200.0250.0

’182018’192019

Average speed, kn

STAR SIENNA
Bulk carrier median

6.08.010.012.0

’182018’192019

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

STAR SIENNA
Bulk carrier median

2.04.06.08.010.0

’182018’192019

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2018→2019	−1.5 kn	+34%	+7%	−54%	+18%	1.5 kn slower, fuel per mile up 34%; 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
2019	not published	2,350	7,343	10,466	1,667	6.3	225	4.14	–
2018	not published	3,805	11,931	22,659	2,894	7.8	168	3.50	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Bulk carrier median	vs Bulk carrier	Rank	Verifier	Methods
2019	not published	4.14	8.38	−51%	185 of 3,360	DNV	B
2018	not published	3.50	8.50	−59%	118 of 3,384	DNV	B

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.