---
title: "GM1 HPT-DSN.A.020 Definitions — Certification Specifications and Guidance Material for Heliport Design (CS-HPT-DSN) — Issue 1, Aerodromes · Avioverse"
description: "Further information on operations of performance classes 1, 2 and 3 helicopters are given in Commission Regulation (EU) No 965/2012 on air operations and…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-hpt-dsn/chapter-a-general/gm1-hpt-dsn-a-020"
---

# GM1 HPT-DSN.A.020 Definitions

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.A.020 Definitions

Further information on operations of performance classes 1, 2 and 3 helicopters are given in Commission Regulation (EU) No 965/2012 on air operations and in ICAO Annex 6, Operations of [Aircraft](https://avioverse.aero/glossary/easa/aircraft), Part III, Helicopters.

GM · GM1 HPT-DSN.A.020 — Regulation (EU) No 139/2014 · ED Decision 2019/012/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER A — GENERAL](https://avioverse.aero/regulations/easa/aerodromes/cs-hpt-dsn/chapter-a-general)

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.