---
title: "GM1 ADR-DSN.L.545 Touchdown zone marking — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "In order to give information regarding the overall extension of a distance coding touchdown marking, as specified in CS ADR-DSN.L.545, the last pair of…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-l-visual-aids-for-navigation-markings/gm1-adr-dsn-l-545"
---

# GM1 ADR-DSN.L.545 Touchdown zone marking

Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7 · Regulation (EU) No 139/2014 · EAR revision 13 Mar 2026

GM Guidance material

## GM1 ADR-DSN.L.545 Touchdown zone marking

(a) In order to give information regarding the overall extension of a distance coding touchdown [marking](https://avioverse.aero/glossary/easa/marking), as specified in CS ADR-DSN.L.545, the last pair of markings after the [threshold](https://avioverse.aero/glossary/easa/threshold) should consist of two single stripes, and the other pairs should correspond to the patterns shown in Figure L-4.

(b) Such sequential layout gives intuitive information about the extension of the [touchdown zone](https://avioverse.aero/glossary/easa/touchdown-zone) and, as a consequence, of the LDA or of the distance between thresholds.

GM · GM1 ADR-DSN.L.545 — Regulation (EU) No 139/2014 · ED Decision 2014/013/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER L — VISUAL AIDS FOR NAVIGATION (MARKINGS)](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-l-visual-aids-for-navigation-markings)

Consolidated from the EASA Easy Access Rules (revision 13 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.