Bulk carrier · Guinea-Bissau flag · built 2001
ASB BONITO: CO₂ emissions 2019–2025
IMO 9015577 EU ETS4 reporting years
- CO₂ reported 2025
- 2,365 t
- Fuel burned
- 748 t
- Distance
- 11,504 nm
- Time at sea
- 1,191 h
- Emitted at berth
- 3% of total
- Share of year under way
- 14%
- Gross tonnage
- 17,394
ASB BONITO against its type
Built in 2001, it is 11 years older than the median bulk carrier on this register, which was built in 2012 (6,882 vessels with a known build year). At 17,394 gross tonnage it is smaller than 94% of the other 6,571 bulk carriers with a recorded tonnage. It is one of 3 bulk carriers here under the Guinea-Bissau flag, 0.0% of the 8,138 on the register. The same builder is recorded for 86 other vessels here, 18 of them bulk carriers. Its MRV returns name it ZEYNEP KIRAN for 2019–2024 and ASB BONITO for 2025. The reported port of registry changed: Istanbul (2019–2024), then Bissau (2025).
Its 2,365 t of CO₂ for 2025 is 27% below the median of 3,239 t among the 3,731 bulk carriers on this register that reported for 2025. Per nautical mile it emitted 205.6 kg CO₂, 21% below the type median of 260.7 kg. It logged 1,191 hours at sea against a median of 1,200 hours for its type that year. 2.9% of its 2025 emissions were at berth; the median for bulk carriers was 3.7%. Across 4 years with reported emissions, the highest was 2025 (2,365 t) and the lowest 2019 (529 t). Of the 3 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2019–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 2,365 | 748 | 11,504 | 1,191 | 68 | 205.6 | 12.2 | 88 |
| 2024 | 1,477 | 469 | — | 957 | 47 | 228.2 | 19.5 | not ranked |
| 2021 | 796 | 255 | — | 346 | 28 | 214.2 | 16.1 | not ranked |
| 2019 | 529 | 168 | — | 534 | 39 | 271.7 | 13.6 | not ranked |
Vessel particulars
- IMO number
- 9015577
- Previously reported as
- ZEYNEP KIRAN
- Ship type
- Bulk carrier
- Gross tonnage
- 17,394
- Length overall
- 181.3 m
- Beam
- 24.8 m
- Year built
- 2001
- Flag state
- Guinea-Bissau per EU MRV 2025
- Builder
- Mangalia Shipyard
- Port of registry
- Bissau MRV 2025
- Home port
- Bissau
- Technical efficiency (design)
- EEXI (5.69 gCO₂/t·nm)
- Verifier
- HELLENIC LLOYD'S S.A., Greece
- Accreditation
- 1190
- Compliance document issued
- 2026-04-22
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 2,861 of 3,241 qualifying bulk carriers by EEOI, at the 88th percentile. The dashed line is the type median, 7.6; this vessel reported 12.2.
EEOI divides emissions by transport work, which for this vessel and year was 194,045,939 tonne-miles over 11,504 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 346.9% higher than in 2019, for EU/EEA voyages only. No return is recorded for 2020, 2022, 2023, so the series has gaps.
From 2024 to 2025, emissions rose 60.2% and CO₂ per nautical mile fell 9.9%.Distance is missing for at least one of the two years, so activity and efficiency cannot be separated here.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 2,402 t
- Methane (CH₄)
- 0.04 t
- Nitrous oxide (N₂O)
- 0.13 t
Laden voyages2025
- CO₂ on laden voyages
- 45 t, 2% of total
- Fuel, laden
- 14 t
The rest of the 2025 total was emitted on ballast legs or at berth.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2019 | Bureau Veritas Certification France | France |
| 2021 | HELLENIC LLOYD'S S.A. | Greece |
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 2019–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 4 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.