---
title: "Obstacle limitation surface — EASA Definition · Avioverse"
description: "Article 2, Regulation (EU) No 139/2014: 'obstacle limitation surface’ means a surface that define the limits to which objects may project into the…"
url: "https://avioverse.aero/glossary/easa/obstacle-limitation-surface"
---

# obstacle limitation surface

EASA defines “obstacle limitation surface” in one regulation, with a separate wording for each case. The wording below is reproduced verbatim from the EASA Easy Access Rules, with a link to the paragraph it comes from.

> 'obstacle limitation surface’ means a surface that define the limits to which objects may project into the airspace;

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 limitation surface’ means a surface that defines the limits to which objects may project into the airspace.

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)
- [aerodrome](https://avioverse.aero/glossary/easa/aerodrome)
- [Aerodrome beacon](https://avioverse.aero/glossary/easa/aerodrome-beacon)
- [Aerodrome elevation](https://avioverse.aero/glossary/easa/aerodrome-elevation)
- [aerodrome equipment](https://avioverse.aero/glossary/easa/aerodrome-equipment)
- [Aerodrome operator](https://avioverse.aero/glossary/easa/aerodrome-operator)
- [Aerodrome traffic density](https://avioverse.aero/glossary/easa/aerodrome-traffic-density-1)