Navalyze · Passenger · Ship

SYMPHONY OF THE SEAS

IMO: 9744001
Type: Passenger ship
Flag (estimated): Bahamas
Port of registry: Nassau
Technical efficiency: EEXI 7.50 g CO₂/t·nm

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel kg/nm

520

Passenger median 270 kg/nm (+92%)

CO₂ per transport work (pax)

274

g CO₂/pax·nm · Passenger median 625 (−56%)

Average speed

16.3 kn

Passenger median 13.7 kn (+19%)

Fuel per day at sea

203.9 t/day

Fuel consumed

28,971 t

CO₂ emitted

89,064 t

Distance sailed

55,730 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,410 h

142 days, 39% of the year

Within the passenger fleet, 2023

Set against all 202 passenger ships with a full-year 2023 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 520 kg/nm · median 270 (+92%)

76.6Ranks 196 of 202, lowest first455

Average speedThis ship 16.3 kn · median 13.7 (+19%)

10.4Faster than 92% of passenger ships16.1

CO₂ per transport work (pax)This ship 274 g CO₂/pax·nm · median 625 (−56%)

330Ranks 11 of 202, lowest first1,931

Middle 80% of shipsMiddle 50%Passenger medianThis ship

Where the emissions happen, 2023

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 ports70%
From the EU5%
Into the EU7%
At berth in the EU18%

Fuel burned laden

–

Not reported

CO₂ at berth

16,388 t

18.4% 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 Passenger median is the middle ship of all passenger ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

SYMPHONY OF THE SEAS
Passenger median

200.0300.0400.0500.0600.0

’182018’232023

Average speed, kn

SYMPHONY OF THE SEAS
Passenger median

10.012.014.016.018.0

’182018’232023

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

SYMPHONY OF THE SEAS
Passenger median

200300400500600700

’182018’232023

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2018→2023	+4.1 kn	+2%	+37%	+4%	+1%	4.1 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
2023	not published	28,971	89,064	55,730	3,410	16.3	520	–	–
2018	not published	27,246	85,215	53,380	4,379	12.2	510	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/pax·nm	Passenger median	vs Passenger	Rank	Verifier	Methods
2023	not published	274	625	−56%	11 of 202	DNV	A
2018	not published	271	577	−53%	3 of 153	DNV	A

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Passenger ships are benchmarked on CO₂ per transport work (pax) (TW), in g CO₂/pax·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 passenger 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.