Navalyze · Ro-pax · Ship

BLUE STAR 1

IMO: 9197105
Type: Ro-pax ship
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EEXI 23.90 g CO₂/t·nm

ISM company (DoC holder) in 2025: BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A. · part of Attica Group

Report year

2020 at a glance

From the 2020 THETIS-MRV report.

Fuel kg/nm

257

Ro-pax median 157 kg/nm (+64%)

CO₂ per transport work (pax)

270

g CO₂/pax·nm · Ro-pax median 751 (−64%)

CO₂ per transport work (freight)

370

g CO₂/t·nm · Ro-pax median 217 (+70%)

Average speed

22.4 kn

Ro-pax median 15.8 kn (+42%)

Fuel per day at sea

137.9 t/day

Fuel consumed

20,089 t

CO₂ emitted

62,594 t

Distance sailed

78,293 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,497 h

146 days, 40% of the year

Within the ro-pax fleet, 2025

Set against all 408 ro-pax 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 242 kg/nm · median 150 (+61%)

69.3Ranks 382 of 408, lowest first232

Average speedThis ship 20.1 kn · median 15.8 (+27%)

12.0Faster than 84% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 114 g CO₂/pax·nm · median 567 (−80%)

66.8Ranks 84 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 658 g CO₂/t·nm · median 253 (+160%)

48.6Ranks 297 of 408, lowest first1,247

Middle 80% of shipsMiddle 50%Ro-pax 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 ports98%
From the EU0%
Into the EU0%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

1,371 t

2.2% 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 Ro-pax median is the middle ship of all ro-pax ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

BLUE STAR 1
Ro-pax median

150.0200.0250.0300.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

BLUE STAR 1
Ro-pax median

14.016.018.020.022.024.0

’182018’192019’202020’212021’222022’232023’242024’252025

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

BLUE STAR 1
Ro-pax median

0.0200400600800

’182018’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (pax), g CO₂/pax·nm

BLUE STAR 1
Ro-pax median

0.02004006008001,000

’182018’192019’202020’212021’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−1.0 kn	+0%	−4%	−11%	−68%	1.0 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+1.9 kn	+10%	+21%	+1%	−7%	1.9 kn faster, fuel per mile up 10%; better than speed alone explains (hull, engine or trade).
2022→2023	+2.4 kn	+12%	+28%	+6%	−39%	2.4 kn faster, fuel per mile up 12%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.4 kn	+7%	+10%	+33%	+50%	0.4 kn faster, fuel per mile up 7%; in line with the speed change.
2020→2021	−6.0 kn	−29%	−48%	−15%	+54%	6.0 kn slower, fuel per mile down 29%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	−0.3 kn	−1%	−3%	−24%	+13%	0.3 kn slower, fuel per mile flat.
2018→2019	+0.7 kn	−2%	+2%	−1%	−18%	0.7 kn faster, fuel per mile flat; 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	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A.	20,603	64,662	85,212	4,243	20.1	242	–	–
2024	BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A.	23,083	71,955	95,945	4,546	21.1	241	–	–
2023	not published	20,716	64,579	94,750	4,928	19.2	219	–	–
2022	not published	17,343	54,035	89,112	5,289	16.8	195	–	–
2021	not published	12,139	37,821	66,912	4,076	16.4	181	–	–
2020	not published	20,089	62,594	78,293	3,497	22.4	257	–	–
2019	not published	26,685	84,126	102,533	4,521	22.7	260	–	–
2018	not published	27,507	86,718	104,052	4,740	22.0	264	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/pax·nm	Ro-pax median	vs Ro-pax	Rank	Freight, g CO₂/t·nm	Ro-pax median	vs Ro-pax	Verifier	Methods
2025	BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A.	114	567	−80%	84 of 408	658	253	+160%	Verifavia	B
2024	BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A.	354	547	−35%	154 of 404	476	233	+104%	Verifavia	B
2023	not published	381	680	−44%	125 of 386	494	234	+111%	Verifavia	–
2022	not published	622	626	−1%	197 of 394	630	253	+149%	Verifavia	B
2021	not published	416	815	−49%	138 of 377	599	226	+165%	Verifavia	B
2020	not published	270	751	−64%	114 of 387	370	217	+70%	Verifavia	B
2019	not published	239	569	−58%	118 of 394	336	223	+51%	Verifavia	B
2018	not published	291	729	−60%	115 of 361	386	184	+110%	Verifavia	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Ro-pax ships are benchmarked on CO₂ per transport work (pax) (TW), in g CO₂/pax·nm, and also per tonne of freight (g CO₂/t·nm freight). CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's ro-pax 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.