Navalyze · Passenger · Ship

RUBY PRINCESS

IMO: 9378462
Type: Passenger ship
Port of registry: Hamilton
Technical efficiency: EEXI 9.91 g CO₂/t·nm

ISM company (DoC holder) in 2024: Princess Cruise Lines Ltd · part of Carnival Corporation

Report year

2024 at a glance

From the 2024 THETIS-MRV report.

Fuel per mile

433.4 kg/nm

Passenger median 245.0 kg/nm (+77%)

CO₂ per transport work (pax)

463

g CO₂/pax·nm · Passenger median 618 (−25%)

Average speed

9.5 kn

Passenger median 13.3 kn (−29%)

Fuel per day at sea

98.7 t/day

Fuel consumed

174 t

CO₂ emitted

552 t

561 t CO₂eq incl. CH₄ and N₂O

Distance sailed

402 nm

CO₂ ÷ CO₂ per mile

Time at sea

42 h

2 days, 0% of the year

Within the passenger fleet, 2024

Set against all 202 passenger ships with a full-year 2024 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 433.4 kg/nm · median 245.0 (+77%)

69.4Ranks 184 of 202, lowest first430.7

Average speedThis ship 9.5 kn · median 13.3 (−29%)

9.8Faster than 8% of passenger ships15.9

CO₂ per transport work (pax)This ship 463.03 g CO₂/pax·nm · median 618.41 (−25%)

318.58Ranks 75 of 202, lowest first1,842.10

Middle 80% of shipsMiddle 50%Passenger medianThis ship

Where the emissions happen, 2024

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 ports25%
From the EU26%
Into the EU25%
At berth in the EU24%

26% of this ship's CO₂ falls under the EU ETS (142 t).

Fuel burned laden

–

Not reported

CO₂ at berth

23.8%

Alongside in EU ports

Methane (CH₄)

0.0 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

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

RUBY PRINCESS
Passenger median

200.0300.0400.0500.0

’232023’242024

Average speed, kn

RUBY PRINCESS
Passenger median

8.010.012.014.0

’232023’242024

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

RUBY PRINCESS
Passenger median

450500550600650

’232023’242024

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2023→2024	−1.5 kn	−6%	−20%	−10%	−14%	1.5 kn slower, fuel per mile down 6%; worse than speed alone explains (fouling, weather, loading 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
2024	Princess Cruise Lines Ltd	174	552	402	42	9.5	433.4	–	–
2023	not published	206	656	445	40	11.0	463.5	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/pax·nm	Passenger median	vs Passenger	Rank	Verifier	Methods
2024	Princess Cruise Lines Ltd	463.03	618.41	−25%	75 of 202	DNV	A
2023	not published	536.54	625.29	−14%	89 of 202	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.