# Airspace: flight hazards

A map of a former edition of the Atlas of Switzerland, the national atlas published by ETH Zurich. It opens only in the desktop atlas (version 4) for Windows and macOS, not in the web atlas; see the links below.

- Map: https://atlasderschweiz.ch/en/theme/airspace-flight-hazards/
- Short title: Airspace: hazards
- Map id: 571
- Categories: Traffic and Communication › Air traffic › Aero-installations and air space
- Published: 2019-03-13
- Last revised: 2021-06-25
- Content language: English
- Other languages: [Deutsch](https://atlasderschweiz.ch/de/thema/luftraum-luftfahrthindernisse.md), [Français](https://atlasderschweiz.ch/fr/theme/espace-aerien-obstacles-a-la-navigation-aerienne.md), [Italiano](https://atlasderschweiz.ch/it/tema/spazio-aereo-ostacoli-alla-navizgazione-aerea.md)

## Description

Buildings, aerials, towers, cranes, cableways, high-tension pylons or even taller constructions can represent flight hazards and affect the safety of aircraft and helicopters. All such installations therefore have to be registered and must submit to an examination of their technical aeronautical impact right at the planning stage. Constructions are regarded as flight hazards if they are in built-up areas and have a height of at least 60 metres and, outside such areas, a height of at least 25 metres. Furthermore, specific regulations are in force in areas around airports.
FOCA checks whether a construction should be permitted given its likely effect on the safety of air travel and determines which safety measures such as markings and/or warning beacons should be provided. FOCA registers and monitors all constructions which represent a flight hazard and publishes notices about them for pilots. As well as being marked on official national maps of Switzerland, current flight hazard data are available in electronic form at the Federal Office of Topography.

## Sources

- BAZL, OFAC, UFAC, FOCA (2010): [Bundesamt für Zivilluftfahrt](https://www.bazl.admin.ch)

## Data sources

- FOCA (2018): [Luftfahrtinformation](https://www.bazl.admin.ch/bazl/de/home/fachleute/flugverkehr/luftfahrtinformationen.html)

## Data owners

- [Swiss Federal Office of Civil Aviation (FOCA)](http://www.bazl.admin.ch)

## Citation

The terms of use ask to name the Atlas of Switzerland and the data owners, and to keep the source references in exports, screenshots and embeds. Cite the map as:

> Atlas of Switzerland (2021): Airspace: flight hazards. ETH Zürich. Map data © FOCA. https://atlasderschweiz.ch/en/theme/airspace-flight-hazards/

## Links

- Map page, with the description and sources and a button that opens the map in the desktop atlas: https://atlasderschweiz.ch/en/theme/airspace-flight-hazards/
- Open the map in the desktop atlas (version 4), where it is installed: adsglobe://map/571
- Download of the desktop atlas (version 4) for Windows and macOS: https://atlasderschweiz.ch/en/ads4-download/

For the use and citation of maps and data, see the [terms of use](https://atlasderschweiz.ch/en/terms-of-use/).