---
title: "GM1 HPT-DSN.F.710 Visual aids for denoting obstacles — Certification Specifications and Guidance Material for Heliport Design (CS-HPT-DSN) — Issue 1, Aerodromes · Avioverse"
description: "General: If it is not possible to display obstacle lights on obstacles at a heliport intended for use at night, the obstacles should be floodlit."
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-hpt-dsn/chapter-f-visual-aids/gm1-hpt-dsn-f-710"
---

# GM1 HPT-DSN.F.710 Visual aids for denoting obstacles

Certification Specifications and Guidance Material for Heliport Design (CS-HPT-DSN) — Issue 1 · Regulation (EU) No 139/2014 · EAR revision 13 Mar 2026

GM Guidance material

## GM1 HPT-DSN.F.710 Visual aids for denoting obstacles

(a) General: If it is not possible to display [obstacle](https://avioverse.aero/glossary/easa/obstacle) lights on obstacles at a [heliport](https://avioverse.aero/glossary/easa/heliport) intended for use at night, the obstacles should be floodlit.

(b) Location: Obstacle floodlights should be arranged so as to illuminate the entire obstacle and, as far as practicable, in a manner so as not to dazzle helicopter pilots.

(c) Characteristics: Obstacle floodlighting should produce a luminance of at least 10 cd/m2.

GM · GM1 HPT-DSN.F.710 — Regulation (EU) No 139/2014 · ED Decision 2019/012/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER F — VISUAL AIDS](https://avioverse.aero/regulations/easa/aerodromes/cs-hpt-dsn/chapter-f-visual-aids)

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.