Navalyze · Oil tanker · Ship

RIVERA

IMO: 9777943
Type: Oil tanker
Average cargo carried: 45,294 t
Port of registry: Monrovia
Technical efficiency: EEDI 3.21 g CO₂/t·nm
Ice class: IA

ISM company (DoC holder) in 2025: TMS Tankers Ltd. · part of TMS Group (Economou)

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 45,294 t of cargo on average.

Fuel kg/nm

123.2

Oil tanker median 128.5 kg/nm (−4%)

CO₂ per transport work (cargo)

8.51

g CO₂/t·nm · Oil tanker median 7.95 (+7%)

Average speed

10.5 kn

Oil tanker median 10.7 kn (−2%)

Fuel per day at sea

31.0 t/day

Fuel consumed

5,453 t

CO₂ emitted

17,060 t

17,327 t CO₂eq incl. CH₄ and N₂O

Distance sailed

44,259 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,224 h

176 days, 48% 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 123.2 kg/nm · median 128.5 (−4%)

76.1Ranks 736 of 1,665, lowest first190.8

Average speedThis ship 10.5 kn · median 10.7 (−2%)

8.0Faster than 42% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 8.51 g CO₂/t·nm · median 7.95 (+7%)

4.51Ranks 921 of 1,665, lowest first27.66

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2025

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 ports7%
From the EU42%
Into the EU43%
At berth in the EU7%

57% of this ship's CO₂ falls under the EU ETS (9,763 t).

Fuel burned laden

49%

51% in ballast or unladen

CO₂ at berth

7.0%

Alongside in EU ports

Methane (CH₄)

0.3 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq ÷ CO₂

1.016

Uplift 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

RIVERA
Oil tanker median

110.0120.0130.0140.0150.0

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

Average speed, kn

RIVERA
Oil tanker median

4.06.08.010.012.0

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

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

RIVERA
Oil tanker median

4.06.08.010.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.6 kn	+1%	−4%	−36%	+41%	0.6 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.3 kn	−4%	−6%	+155%	+21%	0.3 kn slower, fuel per mile down 4%; in line with the speed change.
2022→2023	+0.6 kn	+0%	+6%	−40%	−39%	0.6 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	−0.4 kn	−0%	−4%	+9%	+24%	0.4 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+1.3 kn	−13%	−1%	+65%	+13%	1.3 kn faster, fuel per mile down 13%; better than speed alone explains (hull, engine or trade).
2019→2020	+1.4 kn	+30%	+51%	−53%	−20%	1.4 kn faster, fuel per mile up 30%; better than speed alone explains (hull, engine or trade).
2018→2019	+2.8 kn	−19%	+21%	+43%	−22%	2.8 kn faster, fuel per mile down 19%; 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
2025	TMS Tankers Ltd.	5,453	17,060	44,259	4,224	10.5	123.2	8.51	49%
2024	TMS Tankers Ltd.	8,351	26,092	68,771	6,195	11.1	121.4	6.04	60%
2023	not published	3,418	10,690	26,971	2,374	11.4	126.7	4.98	73%
2022	not published	5,635	17,633	44,599	4,134	10.8	126.3	8.17	44%
2021	not published	5,169	16,292	40,737	3,624	11.2	126.9	6.61	–
2020	not published	3,609	11,410	24,758	2,493	9.9	145.8	5.84	–
2019	not published	5,865	18,393	52,329	6,132	8.5	112.1	7.34	–
2018	not published	5,074	15,941	36,591	6,421	5.7	138.7	9.36	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	TMS Tankers Ltd.	8.51	7.95	+7%	921 of 1,665	ABS	B
2024	TMS Tankers Ltd.	6.04	8.06	−25%	488 of 1,787	ABS	B
2023	not published	4.98	8.44	−41%	221 of 1,797	ABS	B
2022	not published	8.17	8.51	−4%	924 of 1,961	ABS	B
2021	not published	6.61	8.86	−25%	519 of 1,789	ABS	B
2020	not published	5.84	9.03	−35%	337 of 1,870	ABS	B
2019	not published	7.34	8.83	−17%	689 of 1,919	ABS	B
2018	not published	9.36	8.86	+6%	954 of 1,779	ABS	B

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.