---
title: "Appendix 4 Acronyms Used in this AMC — CS-25 · Avioverse"
description: "AC (FAA) Advisory Circular AMC Acceptable Means of Compliance ARAC Aviation Rulemaking Advisory Committee ARP Aerospace Recommended Practices AS…"
url: "https://avioverse.aero/regulations/easa/cs-25/general-amcs/appendix-4"
---

# Appendix 4 Acronyms Used in this AMC

Large Aeroplanes (CS-25) · CS-25 · EAR revision 26 Jan 2023

Appendix Appendix

## Appendix 4 Acronyms Used in this AMC

| AC      | (FAA) Advisory Circular                                      |
| ------- | ------------------------------------------------------------ |
| AMC     | Acceptable Means of Compliance                               |
| ARAC    | Aviation Rulemaking Advisory Committee                       |
| ARP     | Aerospace Recommended Practices                              |
| AS      | Aerospace Standard                                           |
| CCD     | Cursor Control Device                                        |
| CFR     | Code of Federal Regulations                                  |
| CRT     | Cathode Ray Tube                                             |
| CS-AWO  | EASA Certification Specifications for All Weather Operations |
| DEP     | Design Eye Position                                          |
| EASA    | European Aviation Safety Agency                              |
| EFVS    | Enhanced Flight Vision System                                |
| ERP     | Eye Reference Position                                       |
| ETSO    | European Technical Standard Order                            |
| EUROCAE | European Organisation for Civil Aviation Equipment           |
| EVS     | Enhanced Vision System                                       |
| FAA     | Federal Aviation Administration                              |
| FADEC   | Full Authority Digital Engine Controls                       |
| FD      | Flight Director                                              |
| FHA     | Functional Hazard Assessment                                 |
| FMS     | Flight Management System                                     |
| FOV     | Field-of-View                                                |
| FPA     | Flight Path Angle                                            |
| FPV     | Flight Path Vector                                           |
| GNSS    | Global Navigation Satellite System                           |
| GUI     | Graphical User Interface                                     |
| HDD     | Head-Down Display                                            |
| HMD     | Head-Mounted Display                                         |
| HUD     | Head-Up Display                                              |
| ILS     | Instrument Landing System                                    |
| ICAO    | International Civil Aviation Organization                    |
| JAA     | Joint Aviation Authorities                                   |
| LCD     | Liquid Crystal Display                                       |
| MSG-3   | Maintenance Steering Group 3                                 |
| PF      | Pilot Flying                                                 |
| PNF     | Pilot Not Flying                                             |
| RA      | Resolution Advisory                                          |
| RNAV    | Area Navigation                                              |
| SAE     | SAE International (formerly Society of Automotive Engineers) |
| SVS     | Synthetic Vision System                                      |
| TAWS    | Terrain Awareness and Warning System                         |
| TCAS    | Traffic Alert and Collision Avoidance System                 |
| VFR     | Visual Flight Rules                                          |
| VNAV    | Vertical Navigation                                          |
| VOR     | Very High Frequency Omnirange Stations                       |

\[Amdt 25/11]

\[Amdt 25/17]

APPENDIX · Appendix 4 — CS-25 · ED Decision 2015/019/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in GENERAL AMCs](https://avioverse.aero/regulations/easa/cs-25/general-amcs)

Consolidated from the EASA Easy Access Rules (revision 26 Jan 2023, 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.