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Spanish airspace –both sovereign and delegated to Spain by international treaties– is divided into Flight Information Regions (FIR): Madrid, Barcelona and the Canary Islands, which stand for the respective Centre-North, East and Canary Islands Regional Directorates. Likewise, there are two other Regional Directorates: the Southern Region –by delegation from the Madrid FIR– and the Balearic Islands region –within Barcelona's FIR–. Each of these provide air traffic control and information for the regions they cover.

Each of the regional directorates carries out the same functions in their respective areas. These include the following:

• Planning, organisation and management of air traffic and aeronautical information services, as well as maintenance of the facilities and air navigation system communications networks assigned to each region.
• Management and application of the strategic and operational plans in each area; needs analysis and project implementation for new air navigation infrastructures and proposals for modifications to the configuration of the regional airspace.
• Co-ordination and management of human resources in each region.

Each FIR is divided, in turn, into several sectors. The purpose is to achieve the maximum safety and control in air operations.

The headquarters of the regional directoratesare located in the air traffic control centres (ACC) in Madrid, Barcelona, Seville and Gran Canaria, and in the terminal area control centre (TACC) of Palma de Mallorca. Through these strategic control centres, Aena guarantees the safety and permanent management of air traffic.

Operational Support Departments

Each air traffic control centre (ACC) has a number of operational support facilities:

• Flow Management Position (FMP), which, together with Eurocontrol in Brussels, directly co-ordinates air traffic flow and aspects related to traffic load and overload, in addition to any anomalies that may arise.
• Operational Air Traffic Control (OAC), dependent on the Ministry of Defence, for co-ordination of civilian-military air traffic.
• Fixed service station, responsible for communicating flight plans, as well as possible incidents in its own area and in collateral areas.