Navalyze · Oil tanker · Ship

IVER BEST

IMO: 9588275
Type: Oil tanker
Average cargo carried: 2,687 t
Flag (estimated): Gibraltar
Port of registry: Gibraltar
Technical efficiency: EIV 19.74 g CO₂/t·nm

ISM company (DoC holder) in 2025: Iver Ships BV

Report year

2022 at a glance

From the 2022 THETIS-MRV report. Carries about 2,441 t of cargo on average.

Fuel kg/nm

46.3

Oil tanker median 131 kg/nm (−65%)

CO₂ per transport work (cargo)

59.2

g CO₂/t·nm · Oil tanker median 8.51 (+596%)

Average speed

9.8 kn

Oil tanker median 10.9 kn (−10%)

Fuel per day at sea

10.9 t/day

Fuel consumed

1,529 t

CO₂ emitted

4,771 t

Distance sailed

32,996 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,364 h

140 days, 38% 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 47.2 kg/nm · median 129 (−63%)

76.1Ranks 23 of 1,665, lowest first191

Average speedThis ship 9.3 kn · median 10.7 (−13%)

8.0Faster than 20% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 56.1 g CO₂/t·nm · median 7.95 (+605%)

4.51Ranks 1,618 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2022

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 ports17%
From the EU34%
Into the EU41%
At berth in the EU8%

Fuel burned laden

–

Not reported

CO₂ at berth

384 t

8.1% 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 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

IVER BEST
Oil tanker median

25.050.075.0100.0125.0150.0

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

Average speed, kn

IVER BEST
Oil tanker median

4.06.08.010.012.0

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

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

IVER BEST
Oil tanker median

0.025.050.075.0100

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+2.1 kn	+4%	+34%	+23%	−20%	2.1 kn faster, fuel per mile up 4%; better than speed alone explains (hull, engine or trade).
2023→2024	−3.7 kn	+14%	−24%	−25%	+40%	3.7 kn slower, fuel per mile up 14%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+1.1 kn	−14%	−5%	+37%	−15%	1.1 kn faster, fuel per mile down 14%; better than speed alone explains (hull, engine or trade).
2021→2022	−1.1 kn	+3%	−8%	+167%	−25%	1.1 kn slower, fuel per mile up 3%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2021	+5.3 kn	−15%	+66%	−60%	−10%	5.3 kn faster, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2018→2019	+0.9 kn	−7%	+11%	+1%	+31%	0.9 kn faster, fuel per mile down 7%; 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	Iver Ships BV	1,963	6,260	41,548	4,449	9.3	47.2	56.1	–
2024	Iver Ships BV	1,530	4,794	33,691	4,665	7.2	45.4	70.2	–
2023	not published	1,798	5,615	45,095	4,150	10.9	39.9	50.3	–
2022	not published	1,529	4,771	32,996	3,364	9.8	46.3	59.2	–
2021	not published	556	1,742	12,358	1,130	10.9	45.0	79.4	–
2019	not published	1,620	5,066	30,633	5,497	5.6	52.9	88.4	–
2018	not published	1,723	5,381	30,416	6,471	4.7	56.6	67.4	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Iver Ships BV	56.1	7.95	+605%	1,618 of 1,665	RINA	B
2024	Iver Ships BV	70.2	8.06	+770%	1,776 of 1,787	RINA	B
2023	not published	50.3	8.44	+496%	1,741 of 1,797	RINA	B
2022	not published	59.2	8.51	+596%	1,922 of 1,961	RINA	B
2021	not published	79.4	8.86	+796%	1,784 of 1,789	RINA	B
2019	not published	88.4	8.83	+901%	1,913 of 1,919	RINA	B
2018	not published	67.4	8.86	+661%	1,761 of 1,779	RINA	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.