---
title: "UAS.STS-02.050 Responsibilities of the airspace observer — Annex to Implementing Regulation (EU) 2019/947 — UAS OPERATIONS IN THE ‘OPEN’ AND ‘SPECIFIC’ CATEGORIES, UAS · Avioverse"
description: "An airspace observer shall: maintain a thorough airspace scan of the airspace surrounding the unmanned aircraft in order to identify any risk of a…"
url: "https://avioverse.aero/regulations/easa/uas/annex-to-implementing-regulation-eu-2019-947-uas/appendices/uas-sts-02-050-responsibilities-of-the-airspace-observer"
---

# UAS.STS-02.050 Responsibilities of the airspace observer

Annex to Implementing Regulation (EU) 2019/947 — UAS OPERATIONS IN THE ‘OPEN’ AND ‘SPECIFIC’ CATEGORIES · Regulations (EU) 2019/947 and 2019/945 · EAR revision 29 Jun 2026

IR Implementing rule

## UAS.STS-02.050 Responsibilities of the airspace observer

An [airspace observer](https://avioverse.aero/glossary/easa/airspace-observer) shall:

(1) maintain a thorough airspace scan of the airspace surrounding the [unmanned aircraft](https://avioverse.aero/glossary/easa/unmanned-aircraft) in order to identify any risk of a collision with any manned aircraft;

(2) maintain awareness of the position of the unmanned aircraft through direct airspace observation or through assistance provided by electronic means;

(3) alert the [remote pilot](https://avioverse.aero/glossary/easa/remote-pilot) when a hazard is detected and assist in avoiding or minimising the potential negative effects.

IR — Regulations (EU) 2019/947 and 2019/945 · Regulation (EU) 2020/639 · UAS Easy Access Rules · EAR revision 29 Jun 2026

[All rules in APPENDICES](https://avioverse.aero/regulations/easa/uas/annex-to-implementing-regulation-eu-2019-947-uas/appendices)

Consolidated from the EASA Easy Access Rules (revision 29 Jun 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.