Navalyze · Oil tanker · Ship

SILVER HEBA

IMO: 9718870
Type: Oil tanker
Average cargo carried: 33,227 t
Port of registry: Hong Kong
Technical efficiency: EEDI 4.35 g CO₂/t·nm

ISM company (DoC holder) in 2025: Roc Shipping One Designated Activity Company

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 33,227 t of cargo on average.

Fuel per mile

92.5 kg/nm

Oil tanker median 128.5 kg/nm (−28%)

CO₂ per transport work (cargo)

8.77

g CO₂/t·nm · Oil tanker median 7.95 (+10%)

Average speed

9.7 kn

Oil tanker median 10.7 kn (−9%)

Fuel per day at sea

21.5 t/day

Fuel consumed

2,076 t

CO₂ emitted

6,539 t

6,641 t CO₂eq incl. CH₄ and N₂O

Distance sailed

22,440 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,316 h

97 days, 26% 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 per mileThis ship 92.5 kg/nm · median 128.5 (−28%)

76.1Ranks 345 of 1,665, lowest first190.8

Average speedThis ship 9.7 kn · median 10.7 (−9%)

8.0Faster than 25% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 8.77 g CO₂/t·nm · median 7.95 (+10%)

4.51Ranks 947 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 ports31%
From the EU43%
Into the EU17%
At berth in the EU10%

70% of this ship's CO₂ falls under the EU ETS (4,598 t).

Fuel burned laden

90%

10% in ballast or unladen

CO₂ at berth

9.8%

Alongside in EU ports

Methane (CH₄)

0.1 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 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 per mile, kg/nm

SILVER HEBA
Oil tanker median

60.080.0100.0120.0140.0

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

Average speed, kn

SILVER HEBA
Oil tanker median

4.06.08.010.012.014.0

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

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

SILVER HEBA
Oil tanker median

5.010.015.020.025.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+5.1 kn	−30%	+48%	+1,187%	−61%	5.1 kn faster, fuel per mile down 30%; better than speed alone explains (hull, engine or trade).
2023→2024	−7.2 kn	+99%	−23%	−87%	+173%	7.2 kn slower, fuel per mile up 99%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−0.4 kn	−5%	−8%	−63%	−8%	0.4 kn slower, fuel per mile down 5%; in line with the speed change.
2021→2022	+3.9 kn	−7%	+37%	+193%	−23%	3.9 kn faster, fuel per mile down 7%; better than speed alone explains (hull, engine or trade).
2019→2021	−3.0 kn	−8%	−33%	+36%	+52%	3.0 kn slower, fuel per mile down 8%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	+0.1 kn	+11%	+12%	−64%	+11%	Same speed, fuel per mile up 11%; 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
2025	Roc Shipping One Designated Activity Company	2,076	6,539	22,440	2,316	9.7	92.5	8.77	90%
2024	Roc Shipping One Designated Activity Company	230	733	1,744	381	4.6	131.8	22.62	75%
2023	not published	909	2,890	13,734	1,160	11.8	66.2	8.30	–
2022	not published	2,562	8,063	36,799	3,014	12.2	69.6	9.05	–
2021	not published	938	2,932	12,557	1,514	8.3	74.7	11.72	–
2019	not published	753	2,374	9,233	816	11.3	81.6	7.71	–
2018	not published	1,912	5,992	26,007	2,318	11.2	73.5	6.93	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Roc Shipping One Designated Activity Company	8.77	7.95	+10%	947 of 1,665	Lloyd's Register	A+C
2024	Roc Shipping One Designated Activity Company	22.62	8.06	+181%	1,564 of 1,787	Lloyd's Register	A+C
2023	not published	8.30	8.44	−2%	879 of 1,797	ClassNK	B+C
2022	not published	9.05	8.51	+6%	1,069 of 1,961	ABS	B+C
2021	not published	11.72	8.86	+32%	1,206 of 1,789	ABS	C
2019	not published	7.71	8.83	−13%	758 of 1,919	ABS	C
2018	not published	6.93	8.86	−22%	569 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.