Description

On-Line Data Interchange (OLDI) is a protocol for co-ordination and transfer of current flight data between adjacent air traffic control units. Its development started in the 1990s in Europe.

The main objective of applying OLDI for ATC purposes is:

• to automate co-ordination and flight data information exchange between ATC units
• to ensure timely delivery of standard messages

In order to facilitate implementation, common rules and message formats were elaborated and agreed by the agencies concerned.