---
title: "GM1 ADR-DSN.N.775 General — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "Signs may need to be orientated to improve readability. Guidance on signs is contained in ICAO Doc 9157, Aerodrome Design Manual, Part 4, Visual Aids…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-n-visual-aids-for-navigation-signs/gm1-adr-dsn-n-775"
---

# GM1 ADR-DSN.N.775 General

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.N.775 General

(a) Signs may need to be orientated to improve readability.

(b) Guidance on signs is contained in ICAO Doc 9157, [Aerodrome](https://avioverse.aero/glossary/easa/aerodrome) Design Manual, Part 4, [Visual Aids](https://avioverse.aero/glossary/easa/visual-aids), Chapter 11.

(c) Guidance on [frangibility](https://avioverse.aero/glossary/easa/frangibility) is contained in ICAO Doc 9157, Aerodrome Design Manual, Part 6, Frangibility.

(d) Guidance on measuring the average luminance of a [sign](https://avioverse.aero/glossary/easa/sign) is contained in ICAO Doc 9157, Aerodrome Design Manual, Part 4, Visual Aids.

\[Issue: ADR-DSN/3]

\[Issue: ADR-DSN/6]

GM · GM1 ADR-DSN.N.775 — Regulation (EU) No 139/2014 · ED Decision 2022/006/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER N — VISUAL AIDS FOR NAVIGATION (SIGNS)](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-n-visual-aids-for-navigation-signs)

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.