Illustration: Luís de Camões Airport Observatory (original work). Not to scale; not the airport design.

Source document
Defence Ministry announces the location of the new firing range in Alter do Chão
Announcement that the replacement military firing range (about 7,500 ha) will be in Alter do Chão, with the support of the municipal council (per the research dossier).
Claim
Firing-range land to be released in phases by 2029
Status: Target / forecast
The phased demilitarisation schedule provides for releasing the area needed for the airport by 2029.
Claim
Replacement firing range in Alter do Chão
Status: Officially proposed
The Ministry of National Defence announced in March 2026 that the replacement military firing range, of about 7,500 hectares, will be in Alter do Chão, with the municipal council's support.