Navalyze · Ro-pax · Ship

BLUE STAR NAXOS

IMO: 9241786
Type: Ro-pax ship
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EEXI 43.70 g CO₂/t·nm

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

Report year

2018 at a glance

From the 2018 THETIS-MRV report.

Fuel kg/nm

129

Ro-pax median 158 kg/nm (−19%)

CO₂ per transport work (pax)

406

g CO₂/pax·nm · Ro-pax median 729 (−44%)

CO₂ per transport work (freight)

768

g CO₂/t·nm · Ro-pax median 184 (+317%)

Average speed

19.5 kn

Ro-pax median 16.1 kn (+21%)

Fuel per day at sea

60.1 t/day

Fuel consumed

13,284 t

CO₂ emitted

41,868 t

Distance sailed

103,343 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,303 h

221 days, 61% 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 114 kg/nm · median 150 (−24%)

69.3Ranks 111 of 408, lowest first232

Average speedThis ship 19.5 kn · median 15.8 (+23%)

12.0Faster than 81% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 116 g CO₂/pax·nm · median 567 (−79%)

66.8Ranks 87 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 1,026 g CO₂/t·nm · median 253 (+305%)

48.6Ranks 349 of 408, lowest first1,247

Middle 80% of shipsMiddle 50%Ro-pax 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 ports91%
From the EU0%
Into the EU0%
At berth in the EU9%

Fuel burned laden

–

Not reported

CO₂ at berth

3,617 t

8.6% 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 NAXOS
Ro-pax median

100.0120.0140.0160.0

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

Average speed, kn

BLUE STAR NAXOS
Ro-pax median

14.016.018.020.0

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

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

BLUE STAR NAXOS
Ro-pax median

0.02505007501,0001,250

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

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

BLUE STAR NAXOS
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	+0.6 kn	−6%	−3%	+9%	−70%	0.6 kn faster, fuel per mile down 6%; better than speed alone explains (hull, engine or trade).
2023→2024	+0.1 kn	−5%	−4%	−13%	−4%	Same speed, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2022→2023	−0.4 kn	+2%	+0%	+6%	+1%	0.4 kn slower, fuel per mile up 2%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.5 kn	+1%	−2%	−4%	−11%	0.5 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−0.3 kn	+1%	−1%	+6%	−4%	0.3 kn slower, fuel per mile flat.
2019→2020	+0.8 kn	−6%	−1%	+6%	+6%	0.8 kn faster, fuel per mile down 6%; better than speed alone explains (hull, engine or trade).
2018→2019	−0.3 kn	+2%	+0%	−7%	+11%	0.3 kn slower, fuel per mile flat.

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.	11,991	37,489	104,784	5,380	19.5	114	–	–
2024	BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A.	11,677	36,382	96,114	5,096	18.9	122	–	–
2023	not published	14,133	44,020	110,910	5,895	18.8	127	–	–
2022	not published	13,093	40,781	104,971	5,481	19.2	125	–	–
2021	not published	13,486	42,003	108,927	5,530	19.7	124	–	–
2020	not published	12,604	39,263	102,389	5,109	20.0	123	–	–
2019	not published	12,608	39,735	96,385	5,032	19.2	131	–	–
2018	not published	13,284	41,868	103,343	5,303	19.5	129	–	–

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.	116	567	−79%	87 of 408	1,026	253	+305%	Verifavia	B
2024	BLUE STAR FERRIES SINGLE MEMBER MARITIME S.A.	394	547	−28%	164 of 404	575	233	+147%	Verifavia	B
2023	not published	410	680	−40%	133 of 386	557	234	+138%	Verifavia	–
2022	not published	404	626	−35%	152 of 394	543	253	+115%	Verifavia	B
2021	not published	454	815	−44%	144 of 377	549	226	+143%	Verifavia	B
2020	not published	475	751	−37%	143 of 387	653	217	+200%	Verifavia	B
2019	not published	449	569	−21%	166 of 394	588	223	+164%	Verifavia	B
2018	not published	406	729	−44%	137 of 361	768	184	+317%	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.