Dictionary: Technical Terms & Abbreviations

Regulatory & Compliance

  • UDB: Union Database for Biofuels – EU traceability system for sustainable fuels

  • RED II / RED III: Renewable Energy Directive – EU legislation setting renewable energy targets

  • ReFuelEU: Regulation mandating SAF blending at EU airports (e.g., 2% in 2025 → 70% by 2050)

  • ISCC EU: International Sustainability & Carbon Certification – certification scheme for EU biofuel compliance

  • SCS: Sustainability Certification Scheme – validates environmental and sustainability compliance

Technical Measurements

  • LCA (incl. et): Life Cycle Assessment including extracted transport – total GHG emissions from production to use

  • CEF: Carbon Emission Factor – used in emission calculations for compliance

  • Energy (MJ): Megajoules – unit of energy used to measure fuel content

  • gCO₂e/MJ: Grams CO₂ equivalent per megajoule – carbon intensity of a fuel

  • Max Blend Ratio: Maximum allowable % of SAF blended with conventional jet fuel

Market & Operations

  • AFS: Alternative Fuel Supplier – supplies sustainable aviation fuels

  • AO: Aircraft Operator – entities using aviation fuel (e.g., airlines)

  • POS: Proof of Sustainability – certifies fuel’s sustainable attributes

  • SAF: Sustainable Aviation Fuel – renewable alternative to fossil jet fuel

  • FPoM: Fuel Put on Market – UDB feature to declare traceable fuel stock availability

Sustainability Categories

  • R-eligible: Renewable-eligible – qualifies for renewable targets/incentives

  • F-eligible: Fuel-eligible – meets aviation fuel specification standards

  • Zero-rating: Tax or duty exemption based on sustainability regulations

  • RFNBO: Renewable Fuels of Non-Biological Origin – synthetic fuels from renewable electricity

  • Annex IX: RED II feedstock list – waste/residue materials eligible for double-counting

Carbon Markets

  • ETS: EU Emissions Trading System – EU carbon pricing mechanism

  • CORSIA: Carbon Offsetting and Reduction Scheme for International Aviation (ICAO-led)

  • Book & Claim: System allowing SAF to be purchased separately from physical delivery

Infrastructure & Logistics

  • Union Airport: EU airports with ≥800,000 passengers or ≥100,000 tonnes freight annually (ReFuelEU criteria)

  • From/To (Site): Origin and destination locations for fuel traceability and compliance

Documentation

  • COQ: Certificate of Quality – confirms that fuel meets required technical specifications

  • COA: Certificate of Analysis – provides detailed lab results on fuel composition and quality

  • MS: Member State – EU country where compliance requirements apply

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