---
title: "Obstacle — EASA Definition · Avioverse"
description: "Article 2, Regulation (EU) No 923/2012: ‘obstacle’ means all fixed (whether temporary or permanent) and mobile objects, or parts thereof, that:"
url: "https://avioverse.aero/glossary/easa/obstacle"
---

# obstacle

EASA defines “obstacle” in 2 regulations, worded for each regulation's scope. The wording below is reproduced verbatim from the EASA Easy Access Rules, with a link to the paragraph it comes from.

> ‘obstacle’ means all fixed (whether temporary or permanent) and mobile objects, or parts thereof, that:
>
> (a) are located on an area intended for the surface movement of aircraft; or
>
> (b) extend above a defined surface intended to protect aircraft in flight; or
>
> (c) stand outside those defined surfaces and that have been assessed as being a hazard to air navigation;

Article 2 · Standardised European Rules of the Air (SERA) · Regulation (EU) No 923/2012 · Easy Access Rules, 26 Aug 2025 revision · [Read Article 2](https://avioverse.aero/regulations/easa/sera/cover-regulation/powers-and-recital#article-2)

> 'obstacle’ means all fixed (whether temporary or permanent) and mobile objects, or parts thereof, that:
>
> are located on an area intended for the surface movement of aircraft; or
>
> extend above a defined surface intended to protect aircraft in flight; or
>
> stand outside those defined surfaces and that have been assessed as being a hazard to air navigation;

Article 2 · Aerodromes · Regulation (EU) No 139/2014 · Easy Access Rules, 13 Mar 2026 revision · [Read Article 2](https://avioverse.aero/regulations/easa/aerodromes/cover-regulation/powers-and-recitals#article-2)

> ‘Obstacle’ means all fixed (whether temporary or permanent) and mobile objects, or parts thereof, that:
>
> are located on an area intended for the surface movement of aircraft; or
>
> extend above a defined surface intended to protect aircraft in flight; or
>
> stand outside those defined surfaces and that have been assessed as being a hazard to air navigation.

CS ADR-DSN.A.002 · Aerodromes · Regulation (EU) No 139/2014 · Easy Access Rules, 13 Mar 2026 revision · [Read CS ADR-DSN.A.002](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-a-general#cs-adr-dsn-a-002)

## Defined in the same article

- [accelerate-stop distance available (ASDA)](https://avioverse.aero/glossary/easa/accelerate-stop-distance-available)
- [accuracy](https://avioverse.aero/glossary/easa/accuracy)
- [advisory airspace](https://avioverse.aero/glossary/easa/advisory-airspace)
- [advisory route](https://avioverse.aero/glossary/easa/advisory-route)
- [aerial work](https://avioverse.aero/glossary/easa/aerial-work)
- [aerobatic flight](https://avioverse.aero/glossary/easa/aerobatic-flight)
- [aerodrome](https://avioverse.aero/glossary/easa/aerodrome)
- [Aerodrome beacon](https://avioverse.aero/glossary/easa/aerodrome-beacon)