---
title: "GM1 to (a)(1) of AMC1 SERA.7002(a)(1) Collision hazard information when ATS based on surveillance are provided — ANNEX: Rules of the Air, SERA · Avioverse"
description: "In cases where using the terms of the 12-hour clock is not practicable, like when the aircraft is turning, the direction of the unknown aircraft may be…"
url: "https://avioverse.aero/regulations/easa/sera/annex-rules-of-the-air/section-7/gm1-to-a-1-of-amc1-sera-7002-a-1-collision-hazard-information-when-ats-based-on"
---

# GM1 to (a)(1) of AMC1 SERA.7002(a)(1) Collision hazard information when ATS based on surveillance are provided

ANNEX: Rules of the Air · Regulation (EU) No 923/2012 · EAR revision 26 Aug 2025

GM Guidance material

## GM1 to (a)(1) of AMC1 SERA.7002(a)(1) Collision hazard information when ATS based on surveillance are provided

In cases where using the terms of the 12-hour clock is not practicable, like when the [aircraft](https://avioverse.aero/glossary/easa/aircraft) is turning, the direction of the unknown aircraft may be given by compass points, e.g. northwest, south, etc.;

GM — Regulation (EU) No 923/2012 · ED Decision 2016/023/R · SERA Easy Access Rules · EAR revision 26 Aug 2025

[All rules in SECTION 7 Air traffic services](https://avioverse.aero/regulations/easa/sera/annex-rules-of-the-air/section-7)

Consolidated from the EASA Easy Access Rules (revision 26 Aug 2025, 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.