DESFA (National Natural Gas System Operator S.A.) is a natural gas transmission system operator in Greece. 

Transfer Services include:

• The receipt by the Gas Quantity Manager from one or more Entry Points.
• The transfer of the Quantity of Natural Gas through the NSRF.
• The delivery of Quantity of Natural Gas by the Administrator to one or more Exit Points.
• The execution of the necessary measurements through the measuring devices at the Entry and Exit Points.

LNG Installation Use Services include:

• The LNG Unloading which consists of the LNG Ship Connection, the LNG Injection and the LNG Ship Disconnection.
• The provision to the User of LNG storage space in the LNG Facility for the temporary storage of LNG Cargo (LNG Temporary Storage).
• The gasification of the LNG Cargo and its subsequent injection into the Transmission System through the LNG Entry Point.
• The execution of the necessary measurements as well as any action required for the efficient, safe and cost-effective operation of the LNG Facility, in the context of providing the services mentioned above.