Navalyze · Oil tanker · Ship

FLAGSHIP SAGE

IMO: 9471329
Type: Oil tanker
Average cargo carried: 29,342 t
Flag (estimated): Marshall Islands
Port of registry: Majuro, Marshall Islands
Technical efficiency: EEXI 4.09 g CO₂/t·nm

ISM company (DoC holder) in 2025: Prime Tanker Management Inc

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 29,342 t of cargo on average.

Fuel kg/nm

127

Oil tanker median 129 kg/nm (−2%)

CO₂ per transport work (cargo)

13.6

g CO₂/t·nm · Oil tanker median 7.95 (+71%)

Average speed

12.9 kn

Oil tanker median 10.7 kn (+21%)

Fuel per day at sea

39.2 t/day

Fuel consumed

2,614 t

CO₂ emitted

8,241 t

8,369 t CO₂eq incl. CH₄ and N₂O

Distance sailed

20,652 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,600 h

67 days, 18% of the year

Within the oil tanker fleet, 2025

Set against all 1,665 oil tanker 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 127 kg/nm · median 129 (−2%)

76.1Ranks 796 of 1,665, lowest first191

Average speedThis ship 12.9 kn · median 10.7 (+21%)

8.0Faster than 98% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 13.6 g CO₂/t·nm · median 7.95 (+71%)

4.51Ranks 1,250 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2025

THETIS splits each ship's emissions 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 ports0%
From the EU48%
Into the EU47%
At berth in the EU5%

52% of this ship's CO₂ falls under the EU ETS (4,312 t).

Fuel burned laden

1,242 t

48% of all fuel; 53% in ballast or unladen

CO₂ at berth

383 t

4.7% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+128 t

+1.6% CO₂eq on top of CO₂ alone, from CH₄ and N₂O; counted in full from 2026

Over the years

Full-year reports only. The Oil tanker median is the middle ship of all oil tanker ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

FLAGSHIP SAGE
Oil tanker median

110.0120.0130.0140.0150.0160.0

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

Average speed, kn

FLAGSHIP SAGE
Oil tanker median

8.010.012.014.0

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

CO₂ per transport work (cargo), g CO₂/t·nm

FLAGSHIP SAGE
Oil tanker median

0.020.040.060.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+0.7 kn	+11%	+17%	+126%	+0%	0.7 kn faster, fuel per mile up 11%; in line with the speed change.
2023→2024	−1.0 kn	−23%	−29%	+113%	+59%	1.0 kn slower, fuel per mile down 23%; better than speed alone explains (hull, engine or trade).
2022→2023	+0.8 kn	+18%	+26%	−33%	+5%	0.8 kn faster, fuel per mile up 18%; in line with the speed change.
2021→2022	+0.0 kn	−16%	−16%	+77%	–	Same speed, fuel per mile down 16%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.5 kn	+29%	+34%	−65%	–	0.5 kn faster, fuel per mile up 29%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+3.9 kn	−2%	+46%	+113%	−80%	3.9 kn faster, fuel per mile down 2%; better than speed alone explains (hull, engine or trade).
2018→2019	−1.8 kn	−4%	−21%	−29%	+701%	1.8 kn slower, fuel per mile down 4%; 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	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	Prime Tanker Management Inc	2,614	8,241	20,652	1,600	12.9	127	13.6	48%
2024	Prime Tanker Management Inc	1,043	3,264	9,122	748	12.2	114	13.6	47%
2023	not published	640	2,007	4,285	326	13.2	149	8.55	85%
2022	not published	802	2,528	6,350	512	12.4	126	8.11	86%
2021	not published	538	1,684	3,583	288	12.4	150	–	–
2020	not published	1,197	3,756	10,255	861	11.9	117	10.7	–
2019	not published	575	1,796	4,816	603	8.0	119	52.0	–
2018	not published	842	2,631	6,811	696	9.8	124	6.49	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Prime Tanker Management Inc	13.6	7.95	+71%	1,250 of 1,665	ABS	B+C
2024	Prime Tanker Management Inc	13.6	8.06	+68%	1,383 of 1,787	ABS	B+C
2023	not published	8.55	8.44	+1%	915 of 1,797	ABS	B+C
2022	not published	8.11	8.51	−5%	916 of 1,961	ABS	B+C
2021	not published	–	–	–	–	ABS	B+C
2020	not published	10.7	9.03	+18%	1,135 of 1,870	ABS	B+C
2019	not published	52.0	8.83	+489%	1,861 of 1,919	ABS	B+C
2018	not published	6.49	8.86	−27%	496 of 1,779	ABS	B+C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Oil tanker ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·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 oil tanker 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.