---
title: "CS ADR-DSN.K.490 – CS ADR-DSN.K.515: CHAPTER K — VISUAL AIDS FOR NAVIGATION (INDICATORS AND SIGNALLING DEVICES) (Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes) — rule index · Avioverse"
description: "CS ADR-DSN.K.490 – CS ADR-DSN.K.515, Regulation (EU) No 139/2014. An aerodrome should be equipped with a sufficient number of wind direction indicators…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators"
---

# CHAPTER K — VISUAL AIDS FOR NAVIGATION (INDICATORS AND SIGNALLING DEVICES)

Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7 · Aerodromes · Regulation (EU) No 139/2014 · CS ADR-DSN.K.490 – CS ADR-DSN.K.515

On this page

1. ## [CS ADR-DSN.K.490 Wind direction indicator](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/cs-adr-dsn-k-490)

   An aerodrome should be equipped with a sufficient number of wind direction indicators in order to provide wind information to the pilot during approach…

2. ## [GM1 ADR-DSN.K.490 Wind direction indicator](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/gm1-adr-dsn-k-490)

   Wind direction indicators are important visual aids for all runway ends.

3. ## [CS ADR-DSN.K.495 Landing direction indicator](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/cs-adr-dsn-k-495)

   Location: Where provided, a landing direction indicator should be located in a conspicuous place on the aerodrome.

4. ## [GM1 ADR-DSN.K.495 Landing direction indicator](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/gm1-adr-dsn-k-495)

   The landing ‘T’ may be constructed of wood or other light material and its dimensions may correspond to those shown in Figure K-1.

5. ## [CS ADR-DSN.K.500 Signalling lamp](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/cs-adr-dsn-k-500)

   A signalling lamp should be provided at a controlled aerodrome in the aerodrome control tower.

6. ## [GM1 ADR-DSN.K.500 Signalling lamp](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/gm1-adr-dsn-k-500)

   When selecting the green light, use should be made of the restricted boundary of green as specified in GM1 ADR-DSN.U.930(a).

7. ## [CS ADR-DSN.K.505 Signal panels and signal area](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/cs-adr-dsn-k-505)

   intentionally left blank

8. ## [GM1 ADR-DSN.K.505 Signal panels and signal area](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/gm1-adr-dsn-k-505)

   A signal panels and signal area should be provided when visual ground signals are used to communicate with aircraft in flight.

9. ## [CS ADR-DSN.K.510 Location of signal panels and signal area](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/cs-adr-dsn-k-510)

   intentionally left blank

10. ## [GM1 ADR-DSN.K.510 Location of signal panels and signal area](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/gm1-adr-dsn-k-510)

    A signal area should be located so as to be visible for all angles of azimuth above an angle of 10° above the horizontal when viewed from a height of 300…

11. ## [CS ADR-DSN.K.515 Characteristics of signal panels and signal area](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/cs-adr-dsn-k-515)

    intentionally left blank

12. ## [GM1 ADR-DSN.K.515 Characteristics of signal panels and signal area](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/gm1-adr-dsn-k-515)

    The signal area should be an even horizontal surface at least 9 m square.

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.

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