---
title: "GM1 ADR-DSN.K.515 Characteristics of signal panels and signal area — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "The signal area should be an even horizontal surface at least 9 m square."
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/gm1-adr-dsn-k-515"
---

# GM1 ADR-DSN.K.515 Characteristics of signal panels and signal area

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.K.515 Characteristics of signal panels and signal area

(a) The [signal area](https://avioverse.aero/glossary/easa/signal-area) should be an even horizontal surface at least 9 m square.

(b) The signal area should be constructed of cement concrete reinforced with an adequate quantity of steel to avoid cracks resulting from unequal settlement. The top surface should be finished smooth with a steel trowel and coated with paint of appropriate colour. The colour of the signal area should be chosen to contrast with the colours of the signal panels to be displayed thereon. More guidance is given 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 3.

(c) The colour of the signal area should be chosen to contrast with the colours of the signal panels used, and it should be surrounded by a white border not less than 0.3 m wide.

\[Issue: ADR-DSN/3]

GM · GM1 ADR-DSN.K.515 — Regulation (EU) No 139/2014 · ED Decision 2016/027/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER K — VISUAL AIDS FOR NAVIGATION (INDICATORS AND SIGNALLING DEVICES)](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators)

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.