Navalyze · Ro-pax · Ship

BLUE STAR CHIOS

IMO: 9215555
Type: Ro-pax ship
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EEXI 35.69 g CO₂/t·nm
Former names: NISSOS CHIOS

ISM company (DoC holder) in 2025: HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA · part of Attica Group

Report year

2022 at a glance

From the 2022 THETIS-MRV report.

Fuel kg/nm

195

Ro-pax median 157 kg/nm (+24%)

CO₂ per transport work (pax)

526

g CO₂/pax·nm · Ro-pax median 626 (−16%)

CO₂ per transport work (freight)

645

g CO₂/t·nm · Ro-pax median 253 (+155%)

Average speed

20.9 kn

Ro-pax median 16.0 kn (+31%)

Fuel per day at sea

97.6 t/day

Fuel consumed

15,124 t

CO₂ emitted

47,108 t

Distance sailed

77,608 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,718 h

155 days, 42% 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 176 kg/nm · median 150 (+17%)

69.3Ranks 280 of 408, lowest first232

Average speedThis ship 21.3 kn · median 15.8 (+35%)

12.0Faster than 87% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 149 g CO₂/pax·nm · median 567 (−74%)

66.8Ranks 106 of 408, lowest first1,569

CO₂ per transport work (freight)This ship 1,161 g CO₂/t·nm · median 253 (+358%)

48.6Ranks 363 of 408, lowest first1,247

Middle 80% of shipsMiddle 50%Ro-pax medianThis ship

Where the emissions happen, 2022

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

1,668 t

3.5% 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 CHIOS
Ro-pax median

100.0200.0300.0400.0

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

Average speed, kn

BLUE STAR CHIOS
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 CHIOS
Ro-pax median

0.01,0002,0003,000

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

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

BLUE STAR CHIOS
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	−0.1 kn	−4%	−4%	+9%	−79%	Same speed, fuel per mile down 4%; in line with the speed change.
2023→2024	−0.4 kn	+1%	−1%	+10%	+5%	0.4 kn slower, fuel per mile flat.
2022→2023	+0.9 kn	−7%	−3%	+34%	+28%	0.9 kn faster, fuel per mile down 7%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.4 kn	+26%	+28%	−22%	−11%	0.4 kn faster, fuel per mile up 26%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−0.3 kn	−15%	−16%	−8%	−7%	0.3 kn slower, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2019→2020	−0.7 kn	−5%	−8%	+4%	+12%	0.7 kn slower, fuel per mile down 5%; in line with the speed change.
2018→2019	−0.6 kn	−48%	−49%	+120%	−32%	0.6 kn slower, fuel per mile down 48%; 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	HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA	21,967	69,749	124,677	5,844	21.3	176	–	–
2024	HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA	20,865	65,026	114,261	5,339	21.4	183	–	–
2023	not published	18,787	58,557	103,808	4,755	21.8	181	–	–
2022	not published	15,124	47,108	77,608	3,718	20.9	195	–	–
2021	not published	15,294	47,638	98,878	4,814	20.5	155	–	–
2020	not published	19,562	60,939	107,299	5,156	20.8	182	–	–
2019	not published	19,747	62,242	103,001	4,797	21.5	192	–	–
2018	not published	17,085	53,848	46,713	2,117	22.1	366	–	–

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	HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA	149	567	−74%	106 of 408	1,161	253	+358%	Verifavia	B
2024	HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA	707	547	+29%	239 of 404	657	233	+182%	RINA	B
2023	not published	672	680	−1%	192 of 386	693	234	+196%	RINA	B
2022	not published	526	626	−16%	179 of 394	645	253	+155%	RINA	B
2021	not published	592	815	−27%	164 of 377	628	226	+178%	RINA	B
2020	not published	640	751	−15%	173 of 387	738	217	+239%	RINA	B
2019	not published	571	569	+0%	198 of 394	650	223	+192%	RINA	B
2018	not published	838	729	+15%	196 of 361	2,508	184	+1,263%	RINA	A

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.