---
title: "CS ADR-DSN.M.670 Runway threshold identification lights — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "Applicability: The inclusion of specifications for runway threshold identification lights is not intended to imply that the runway threshold…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-m-visual-aids-for-navigation-lights/cs-adr-dsn-m-670"
---

# CS ADR-DSN.M.670 Runway threshold identification lights

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

Official sources: [EASA Easy Access Rules (opens in a new tab)](https://www.easa.europa.eu/en/document-library/easy-access-rules/easy-access-rules-aerodromes) · [EUR-Lex 2014/139 (opens in a new tab)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32014R0139)

IR Implementing rule

## CS ADR-DSN.M.670 Runway threshold identification lights

(a) Applicability:

(1) The inclusion of specifications for [runway](https://avioverse.aero/glossary/easa/runway) [threshold](https://avioverse.aero/glossary/easa/threshold) identification lights is not intended to imply that the runway threshold identification lights have to be provided at an [aerodrome](https://avioverse.aero/glossary/easa/aerodrome).

(2) Where provided, runway threshold identification lights should be installed:

(i) at the threshold of a non-precision approach runway when additional threshold conspicuity is necessary or where it is not practicable to provide other approach lighting aids; and

(ii) where a runway threshold is permanently displaced from the runway extremity or temporarily displaced from the normal position and additional threshold conspicuity is necessary.

(b) Location: Runway threshold identification lights should be located symmetrically about the runway centre line, in line with the threshold and approximately 10 m outside each line of runway edge lights.

(c) Characteristics:

(1) Runway threshold identification lights should be flashing white lights with a flash frequency between 60 and 120 per minute;

(2) The lights should be visible only in the direction of approach to the runway.

\[Issue: ADR-DSN/4]

IR · CS ADR-DSN.M.670 — Regulation (EU) No 139/2014 · ED Decision 2017/021/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER M — VISUAL AIDS FOR NAVIGATION (LIGHTS)](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-m-visual-aids-for-navigation-lights)

Consolidated from the EASA Easy Access Rules (revision 13 Mar 2026, extracted 2 Nov 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.