---
title: "Obstacle protection surface — EASA Definition · Avioverse"
description: "Article 2, Regulation (EU) No 139/2014: 'obstacle protection surface’ means a surface established for visual approach slope indicator system above which…"
url: "https://avioverse.aero/glossary/easa/obstacle-protection-surface"
---

# obstacle protection surface

EASA defines “obstacle protection surface” in one regulation, in the same words. The wording below is reproduced verbatim from the EASA Easy Access Rules, with a link to the paragraph it comes from.

> 'obstacle protection surface’ means a surface established for visual approach slope indicator system above which objects or extensions of existing objects shall not be permitted except when, in the opinion of the appropriate authority, the new object or extension would be shielded by an existing immovable object;

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 protection surface’ means a surface established for visual approach slope indicator system above which objects or extensions of existing objects shall not be permitted except when, in the opinion of the appropriate authority, the new object or extension would be shielded by an existing immovable object.

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)