---
title: "GM1 UAS.STS 01.020(1)(c) UAS operations in STS-01 — Annex to Implementing Regulation (EU) 2019/947 — UAS OPERATIONS IN THE ‘OPEN’ AND ‘SPECIFIC’ CATEGORIES, UAS · Avioverse"
description: "GM1 UAS.STS-01.020(1)(c) UAS operations in STS-01 GROUND RISK BUFFER The values for determining the size of the ground risk buffer that are indicated in…"
url: "https://avioverse.aero/regulations/easa/uas/annex-to-implementing-regulation-eu-2019-947-uas/appendices/gm1-uas-sts"
---

# GM1 UAS.STS 01.020(1)(c) UAS operations in STS-01

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

GM Guidance material

## GM1 UAS.STS 01.020(1)(c) UAS operations in STS-01

GM1 UAS.STS-01.020(1)(c) UAS operations in STS-01

[GROUND RISK BUFFER](https://avioverse.aero/glossary/easa/ground-risk-buffer)

The values for determining the size of the ground risk buffer that are indicated in the table of point UAS.STS-01.020(1)(c)(i)(C) should be considered as minimum values. However, additional margins should be considered depending on factors that may increase the distance travelled by the UA, e.g. UA flight characteristics, such as autorotation capability, wind, [remote pilot](https://avioverse.aero/glossary/easa/remote-pilot)’s reaction time, etc.

GM · GM1 UAS.STS — Regulations (EU) 2019/947 and 2019/945 · ED Decision 2022/002/R · 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.