---
title: "GM1 to (a)(4) of AMC1 SERA.7002(a)(1) Collision hazard information when ATS based on surveillance are provided — ANNEX: Rules of the Air, SERA · Avioverse"
description: "The level may be described either as a flight level, altitude or height, or as a relative vertical distance from the aircraft provided with traffic…"
url: "https://avioverse.aero/regulations/easa/sera/annex-rules-of-the-air/section-7/gm1-to-a-4-of-amc1-sera-7002-a-1-collision-hazard-information-when-ats-based-on"
---

# GM1 to (a)(4) 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)(4) of AMC1 SERA.7002(a)(1) Collision hazard information when ATS based on surveillance are provided

The [level](https://avioverse.aero/glossary/easa/level) may be described either as a flight level, [altitude](https://avioverse.aero/glossary/easa/altitude) or [height](https://avioverse.aero/glossary/easa/height), or as a relative vertical distance from the [aircraft](https://avioverse.aero/glossary/easa/aircraft) provided with [traffic information](https://avioverse.aero/glossary/easa/traffic-information) (e.g. 1 000 ft above or 1 000 ft below).

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.