---
title: "GM4 Annex I Definitions — ANNEX I – Definitions, Air OPS · Avioverse"
description: "HEAD-UP GUIDANCE LANDING SYSTEM (HUDLS) A HUDLS is typically used for primary approach guidance to decision heights of 50 ft."
url: "https://avioverse.aero/regulations/easa/air-ops/definitions/powers-and-recitals/gm4-annex-i-definitions"
---

# GM4 Annex I Definitions

ANNEX I – Definitions · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026

GM Guidance material

## GM4 Annex I Definitions

HEAD-UP GUIDANCE LANDING SYSTEM (HUDLS)

A HUDLS is typically used for primary approach guidance to decision heights of 50 ft.

GM — Regulation (EU) No 965/2012 · ED Decision 2012/015/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

[All rules in Powers and recitals](https://avioverse.aero/regulations/easa/air-ops/definitions/powers-and-recitals)

Consolidated from the EASA Easy Access Rules (revision 27 Mar 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.