Oil tanker · Marshall Islands flag · built 2013
GEM TOPAZ: CO₂ emissions 2018–2025
IMO 9645762 6 reporting years
- CO₂ reported 2023
- 5,280 t
- Fuel burned
- 1,681 t
- Distance
- 16,311 nm
- Time at sea
- 1,415 h
- Emitted at berth
- 9% of total
- Share of year under way
- 16%
- Gross tonnage
- 29,715
GEM TOPAZ against its type
Built in 2013, it is 3 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 29,715 gross tonnage it is smaller than 76% of the other 2,841 oil tankers with a recorded tonnage. It is one of 793 oil tankers here under the Marshall Islands flag, 22.4% of the 3,548 on the register. The same builder is recorded for 983 other vessels here, 270 of them oil tankers. Its MRV returns name it STI LE ROCHER for 2018–2023 and GEM TOPAZ for 2025. The returns for 2018–2025 all give Majuro as port of registry.
Its 5,280 t of CO₂ for 2023 is 30% below the median of 7,491 t among the 1,850 oil tankers on this register that reported for 2023. Per nautical mile it emitted 323.7 kg CO₂, 21% below the type median of 408.5 kg. It logged 1,415 hours at sea against a median of 1,807 hours for its type that year. 8.8% of its 2023 emissions were at berth; the median for oil tankers was 8.4%. Across 5 years with reported emissions, the highest was 2018 (11,464 t) and the lowest 2020 (3,617 t). Its efficiency percentile within the type went from 73 in 2018 to 79 in 2023 (lower is more efficient). The one sister ship listed below with a 2023 return reported a higher or equal CO₂ per nautical mile.
No EU/EEA voyages were reported for 2025: zero CO₂ and zero time at sea, left out of the trend and of any ranking.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | No EU/EEA voyages reported | |||||||
| 2023 | 5,280 | 1,681 | 16,311 | 1,415 | 462 | 323.7 | 12.2 | 79 |
| 2021 | 8,135 | 2,598 | 30,990 | 2,674 | 406 | 262.5 | 9.2 | 57 |
| 2020 | 3,617 | 1,157 | 15,523 | 1,272 | 187 | 233.0 | 13.3 | 76 |
| 2019 | 7,635 | 2,438 | 26,200 | 2,393 | 851 | 291.4 | 9.8 | 62 |
| 2018 | 11,464 | 3,658 | 40,267 | 5,669 | 718 | 284.7 | 12.0 | 73 |
Vessel particulars
- IMO number
- 9645762
- Previously reported as
- STI LE ROCHER
- Ship type
- Oil tanker
- Gross tonnage
- 29,715
- Length overall
- 183.3 m
- Year built
- 2013
- Flag state
- Marshall Islands per EU MRV 2025
- Builder
- HD Hyundai Mipo
- Port of registry
- Majuro MRV 2023
- Technical efficiency (design)
- EEXI (4.87 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2024-02-29
- Compliance document expires
- 2025-06-30
Efficiency against its own type2023
Position 1,274 of 1,615 qualifying oil tankers by EEOI, at the 79th percentile. The dashed line is the type median, 8.0; this vessel reported 12.2.
EEOI divides emissions by transport work, which for this vessel and year was 432,780,328 tonne-miles over 16,311 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2023 was 53.9% lower than in 2018, for EU/EEA voyages only. No return is recorded for 2022, 2024, so the series has gaps.
From 2021 to 2023, emissions fell 35.1% while distance sailed fell 47.4%and CO₂ per nautical mile rose 23.3%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2023 emissions occurred
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | DNV | Germany |
| 2025 | NORMEC VERIFAVIA SAS | France |
A change of verifier is not in itself a sign of anything being wrong.
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2018–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 6 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars and a name history. Not found in the sources for this vessel: AIS movements in Norwegian waters, a licensed photograph, a sanctions listing and US port state inspections.
Empty means unreported, never zero. How EEOI, distance, percentiles and sister ships are handled is explained under reading a vessel page. Something wrong? See corrections.