Every body shaping remote and digital towers, with the actual source documents. The single reference operators, vendors, and regulators can point to.
FAA documents archived
United States · Remote Tower Systems (non-federal program)
The FAA's requirements and process for non-federal Remote Tower Systems. RTS are not yet approved for use in the NAS, and no System Design Approval (SDA) has been issued (a 2024 Reauthorization mandate). These are US government documents (public domain), mirrored here and linked to source.
RTS Advisory Circular
Draft Version 3.0 · February 18, 2022 · operating procedures framework
Europe · Acceptable Means of Compliance & guidance
EASA acceptable means of compliance and guidance for remote aerodrome air traffic services and single or multiple remote tower operations. Copyrighted, linked to source rather than rehosted.
EUROCAE Working Group 100 standards for remote and virtual towers, including the ED-240 series (Minimum Aviation System Performance Specification for remote tower optical systems). Copyrighted, purchased and linked at source.
IFATCA position and policy on remote and digital aerodrome services, plus the new IFATCA guidance work underway. The controller perspective on safety and operational acceptability.
A coordinating effort for digital tower testing and adoption. The FAA's own testbed evaluation runs at the William J. Hughes Technical Center, Atlantic City (ACY). Tracked as it develops.
National ANSP requirements building
Per-country
Requirements set by individual ANSPs: Avinor (Norway), LFV (Sweden), NATS (UK), DFS (Germany), HIAL (Scotland), and others. Each shapes how digital towers deploy in its airspace.
FAA documents are US government works (public domain) and are mirrored here with a link to source. International standards (EASA, EUROCAE, ICAO, IFATCA, ITF) are copyrighted and are linked at source, not rehosted. Archived PDFs appear once the document pull has run. The index keeps expanding each entry with summaries, versions, and the specific documents.