Passenger ship (Cruise Passenger ship) · Saint Kitts and Nevis flag · built 1982
BLUE SAPPHIRE: CO₂ emissions 2018–2025
IMO 7822457 EU ETS4 reporting years
- CO₂ reported 2025
- 5,891 t
- Fuel burned
- 1,838 t
- Time at sea
- 1,261 h
- Emitted at berth
- 15% of total
- Share of year under way
- 14%
- Gross tonnage
- 37,049
BLUE SAPPHIRE against its type
Built in 1982, it is 28 years older than the median cruise ship on this register, which was built in 2010 (195 vessels with a known build year). At 37,049 gross tonnage it is smaller than 79% of the other 177 cruise ships with a recorded tonnage. It is the only cruise ship on this register under the Saint Kitts and Nevis flag. The same builder is recorded for 9 other vessels here, one of them a cruise ship. Royal Caribbean International is linked to 25 vessels on this register. Its MRV returns name it SAGA SAPPHIRE for 2018 and BLUE SAPPHIRE for 2023–2025. The reported port of registry changed: Valletta (2018), then BASSETERRE (2023–2025).
Its 5,891 t of CO₂ for 2025 is 81% below the median of 31,269 t among the 200 cruise ships on this register that reported for 2025. Per nautical mile it emitted 419.2 kg CO₂, 49% below the type median of 821.3 kg. It logged 1,261 hours at sea against a median of 3,133 hours for its type that year. 15.3% of its 2025 emissions were at berth; the median for cruise ships was 15.1%. Across 4 years with reported emissions, the highest was 2018 (51,970 t) and the lowest 2023 (769 t). Of the 8 comparable vessels listed below with a 2025 return, 0 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 | 5,891 | 1,838 | — | 1,261 | 899 | 419.2 | — | — |
| 2024 | 7,226 | 2,254 | — | 1,202 | 2,563 | 547.6 | — | — |
| 2023 | 769 | 240 | — | 114 | 238 | 647.5 | — | — |
| 2018 | 51,970 | 16,454 | — | 7,916 | 1,880 | 604.1 | — | — |
Vessel particulars
- IMO number
- 7822457
- Previously reported as
- SAGA SAPPHIRE
- Gross tonnage
- 37,049
- Length overall
- 199.6 m
- Year built
- 1982
- Flag state
- Saint Kitts and Nevis per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Malta. The flag shown is from the newest official source, the EU MRV return for 2025. - Builder
- Bremer Vulkan
- Port of registry
- BASSETERRE MRV 2025
- Home port
- ÇEŞME
- Operator
- Royal Caribbean International, Hapag-Lloyd
- Verifier
- Polish Register of Shipping, Poland
- Accreditation
- PL-VG-0013
- Compliance document issued
- 2026-02-16
- Compliance document expires
- 2027-06-30
Reported CO₂ by year
Reported CO₂ in 2025 was 88.7% lower than in 2018, for EU/EEA voyages only. No return is recorded for 2019, 2020, 2021, 2022, so the series has gaps.
From 2024 to 2025, emissions fell 18.5% and CO₂ per nautical mile fell 23.4%.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
- 5,981 t
- Methane (CH₄)
- 0.09 t
- Nitrous oxide (N₂O)
- 0.33 t
- Under EU ETS
- 3,395 t, 58% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | DNV | Germany |
| 2023 | Phoenix Register of Shipping (PhRS) | Greece |
| 2025 | Polish Register of Shipping | Poland |
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) and Wikimedia Commons.
This page draws on 4 MRV reporting years, 5 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: an efficiency ranking, AIS movements in Norwegian waters, 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.