Bulk carrier · Marshall Islands flag · built 2014
MAMA STRENGTH: CO₂ emissions 2018–2025
IMO 9673525 EU ETS7 reporting years
- CO₂ reported 2025
- 4,752 t
- Fuel burned
- 1,517 t
- Distance
- 15,185 nm
- Time at sea
- 1,375 h
- Emitted at berth
- 3% of total
- Share of year under way
- 16%
- Gross tonnage
- 41,218
MAMA STRENGTH against its type
Built in 2014, it is 2 years newer than the median bulk carrier on this register, which was built in 2012 (6,882 vessels with a known build year). At 41,218 gross tonnage it is larger than 65% of the other 6,571 bulk carriers with a recorded tonnage. It is one of 1,603 bulk carriers here under the Marshall Islands flag, 19.7% of the 8,138 on the register. The same builder is recorded for 65 other vessels here, 44 of them bulk carriers. Columbia Shipmanagement is linked to 42 vessels on this register. Its MRV returns name it RIO TAMARA for 2018–2021 and MAMA STRENGTH for 2022–2025. The reported port of registry changed: Monrovia (2018–2021), then Majuro (2022–2025).
Its 4,752 t of CO₂ for 2025 is 47% above the median of 3,239 t among the 3,731 bulk carriers on this register that reported for 2025. Per nautical mile it emitted 312.9 kg CO₂, 20% above the type median of 260.7 kg. It logged 1,375 hours at sea against a median of 1,200 hours for its type that year. 3.2% of its 2025 emissions were at berth; the median for bulk carriers was 3.7%. Across 7 years with reported emissions, the highest was 2018 (9,433 t) and the lowest 2021 (1,695 t). Its efficiency percentile within the type went from 56 in 2018 to 57 in 2025 (lower is more efficient). Of the 7 sister ships listed below with a 2025 return, 7 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 4,752 | 1,517 | 15,185 | 1,375 | 153 | 312.9 | 8.1 | 57 |
| 2024 | 7,806 | 2,471 | 22,508 | 2,588 | 699 | 346.8 | 8.5 | 58 |
| 2022 | 3,955 | 1,258 | 11,918 | 1,127 | 60 | 331.9 | 7.8 | 42 |
| 2021 | 1,695 | 529 | 5,386 | 458 | 165 | 314.7 | 8.0 | 44 |
| 2020 | 5,840 | 1,864 | 19,243 | 1,391 | 213 | 303.5 | 7.3 | 40 |
| 2019 | 9,123 | 2,912 | 27,058 | 2,385 | 397 | 337.2 | 9.3 | 64 |
| 2018 | 9,433 | 3,014 | 27,851 | 2,726 | 152 | 338.7 | 8.8 | 56 |
Vessel particulars
- IMO number
- 9673525
- Previously reported as
- RIO TAMARA
- Ship type
- Bulk carrier
- Gross tonnage
- 41,218
- Length overall
- 224.9 m
- Beam
- 32.3 m
- Year built
- 2014
- Flag state
- Marshall Islands per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Liberia. The flag shown is from the newest official source, the EU MRV return for 2025. - Port of registry
- Majuro MRV 2025
- Ice class
- IC
- Technical efficiency (design)
- EEDI (3.81 gCO₂/t·nm)
- Operator
- Columbia Shipmanagement
- Verifier
- HELLENIC LLOYD'S S.A., Greece
- Accreditation
- 1190
- Compliance document issued
- 2026-03-30
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 1,861 of 3,241 qualifying bulk carriers by EEOI, at the 57th percentile. The dashed line is the type median, 7.6; this vessel reported 8.1.
Across the 41 ranked vessels operated by Columbia Shipmanagement, the median percentile is 53. This vessel is less efficient than its own fleet median.
EEOI divides emissions by transport work, which for this vessel and year was 583,781,327 tonne-miles over 15,185 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 49.6% lower than in 2018, for EU/EEA voyages only. No return is recorded for 2023, so the series has gaps.
From 2024 to 2025, emissions fell 39.1% while distance sailed fell 32.5%and CO₂ per nautical mile fell 9.8%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 4,826 t
- Methane (CH₄)
- 0.08 t
- Nitrous oxide (N₂O)
- 0.27 t
- Under EU ETS
- 2,617 t, 55% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2022 | 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 2018–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 7 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.