Navalyze · Passenger · Ship

SYMPHONY OF THE SEAS

IMO: 9744001
Type: Passenger ship
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 per mile

519.8 kg/nm

Passenger median 270.1 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 per mileThis ship 519.8 kg/nm · median 270.1 (+92%)

76.6Ranks 196 of 202, lowest first454.7

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 273.76 g CO₂/pax·nm · median 625.29 (−56%)

330.27Ranks 11 of 202, lowest first1,930.62

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

18.4%

Alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

–

Uplift from CH₄ and N₂O, counted in full from 2026

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 per mile, 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	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2023	not published	28,971	89,064	55,730	3,410	16.3	519.8	–	–
2018	not published	27,246	85,215	53,380	4,379	12.2	510.4	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/pax·nm	Passenger median	vs Passenger	Rank	Verifier	Methods
2023	not published	273.76	625.29	−56%	11 of 202	DNV	A
2018	not published	271.14	577.11	−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.