Navalyze · Passenger · Ship

NORWEGIAN GEM

IMO: 9355733
Type: Passenger ship
Flag (estimated): Bahamas
Port of registry: Nassau
Technical efficiency: EEXI 10.33 g CO₂/t·nm

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel kg/nm

407

Passenger median 270 kg/nm (+51%)

CO₂ per transport work (pax)

568

g CO₂/pax·nm · Passenger median 625 (−9%)

Average speed

16.0 kn

Passenger median 13.7 kn (+17%)

Fuel per day at sea

156.6 t/day

Fuel consumed

21,271 t

CO₂ emitted

66,505 t

Distance sailed

52,257 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,259 h

136 days, 37% 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 407 kg/nm · median 270 (+51%)

76.6Ranks 168 of 202, lowest first455

Average speedThis ship 16.0 kn · median 13.7 (+17%)

10.4Faster than 88% of passenger ships16.1

CO₂ per transport work (pax)This ship 568 g CO₂/pax·nm · median 625 (−9%)

330Ranks 96 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 ports55%
From the EU12%
Into the EU12%
At berth in the EU20%

Fuel burned laden

–

Not reported

CO₂ at berth

13,467 t

20.3% 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

NORWEGIAN GEM
Passenger median

250.0300.0350.0400.0450.0

’222022’232023

Average speed, kn

NORWEGIAN GEM
Passenger median

12.013.014.015.016.0

’222022’232023

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

NORWEGIAN GEM
Passenger median

500600700800900

’222022’232023

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2022→2023	+0.3 kn	−5%	−2%	−16%	−32%	0.3 kn faster, fuel per mile down 5%; 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	21,271	66,505	52,257	3,259	16.0	407	–	–
2022	not published	26,422	82,967	61,929	3,949	15.7	427	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/pax·nm	Passenger median	vs Passenger	Rank	Verifier	Methods
2023	not published	568	625	−9%	96 of 202	DNV	B
2022	not published	831	831	+0%	94 of 187	DNV	B

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.