---
title: "GM1 Article 2(25) Definitions — Cover Regulation to Implementing Regulation (EU) 2019/947, UAS · Avioverse"
description: "RESPONSIBILITIES OF THE AIRSPACE OBSERVER (AO) The employment of AOs is not limited to operations covered by STSs — they can be employed also in other…"
url: "https://avioverse.aero/regulations/easa/uas/cover-regulation-to-implementing-regulation-eu/powers-and-recitals/gm1-article-2-25"
---

# GM1 Article 2(25) Definitions

Cover Regulation to Implementing Regulation (EU) 2019/947 · Regulations (EU) 2019/947 and 2019/945 · EAR revision 29 Jun 2026

GM Guidance material

## GM1 Article 2(25) Definitions

RESPONSIBILITIES OF THE [AIRSPACE OBSERVER](https://avioverse.aero/glossary/easa/airspace-observer) (AO)

The employment of AOs is not limited to operations covered by STSs — they can be employed also in other operations under the ‘specific’ category. The AO’s main responsibilities, as defined in point UAS.STS-02.050, are to:

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

(2) maintain awareness of the position of the UA through visual contact 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.

GM · GM1 Article 2(25) — Regulations (EU) 2019/947 and 2019/945 · ED Decision 2022/002/R · UAS Easy Access Rules · EAR revision 29 Jun 2026

[All rules in Powers and recitals](https://avioverse.aero/regulations/easa/uas/cover-regulation-to-implementing-regulation-eu/powers-and-recitals)

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.