Navalyze · Ro-pax · Ship

BLUE STAR 2

IMO: 9207584
Type: Ro-pax ship
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EEXI 23.80 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

250

Ro-pax median 157 kg/nm (+60%)

CO₂ per transport work (pax)

260

g CO₂/pax·nm · Ro-pax median 751 (−65%)

CO₂ per transport work (freight)

346

g CO₂/t·nm · Ro-pax median 217 (+59%)

Average speed

20.0 kn

Ro-pax median 15.8 kn (+27%)

Fuel per day at sea

119.9 t/day

Fuel consumed

20,562 t

CO₂ emitted

64,106 t

Distance sailed

82,179 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,116 h

172 days, 47% 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 238 kg/nm · median 150 (+59%)

69.3Ranks 377 of 408, lowest first232

Average speedThis ship 21.6 kn · median 15.8 (+37%)

12.0Faster than 88% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 57.1 g CO₂/pax·nm · median 567 (−90%)

66.8Ranks 30 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 430 g CO₂/t·nm · median 253 (+70%)

48.6Ranks 260 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 ports96%
From the EU0%
Into the EU0%
At berth in the EU4%

Fuel burned laden

–

Not reported

CO₂ at berth

2,840 t

4.4% 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 2
Ro-pax median

150.0200.0250.0300.0

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

Average speed, kn

BLUE STAR 2
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 2
Ro-pax median

100200300400500

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

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

BLUE STAR 2
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	+0.0 kn	−4%	−4%	+1%	−77%	Same speed, fuel per mile down 4%; in line with the speed change.
2023→2024	−0.5 kn	+3%	+0%	−4%	+5%	0.5 kn slower, fuel per mile up 3%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.4 kn	−2%	+0%	+4%	−3%	0.4 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	+0.8 kn	+1%	+5%	+4%	−10%	0.8 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2020→2021	+0.9 kn	−3%	+2%	+8%	+2%	0.9 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2019→2020	−2.0 kn	−3%	−12%	−15%	+19%	2.0 kn slower, fuel per mile down 3%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	−0.1 kn	−4%	−4%	−4%	−28%	Same speed, fuel per mile down 4%; in line with the speed change.

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.	22,271	69,899	93,406	4,324	21.6	238	–	–
2024	BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A.	22,872	71,339	92,267	4,276	21.6	248	–	–
2023	not published	23,159	72,205	95,952	4,338	22.1	241	–	–
2022	not published	22,601	70,436	92,212	4,240	21.7	245	–	–
2021	not published	21,650	67,470	89,089	4,266	20.9	243	–	–
2020	not published	20,562	64,106	82,179	4,116	20.0	250	–	–
2019	not published	24,848	78,329	96,517	4,390	22.0	257	–	–
2018	not published	26,868	84,699	100,454	4,547	22.1	268	–	–

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.	57.1	567	−90%	30 of 408	430	253	+70%	Verifavia	B
2024	BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A.	244	547	−55%	127 of 404	344	233	+48%	Verifavia	B
2023	not published	233	680	−66%	102 of 386	352	234	+51%	Verifavia	–
2022	not published	239	626	−62%	111 of 394	346	253	+37%	Verifavia	B
2021	not published	265	815	−68%	111 of 377	339	226	+50%	Verifavia	B
2020	not published	260	751	−65%	111 of 387	346	217	+59%	Verifavia	B
2019	not published	219	569	−62%	113 of 394	338	223	+52%	Verifavia	B
2018	not published	305	729	−58%	117 of 361	406	184	+121%	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.