---
title: "AWO.A.SVGS.128 CS AWO.A.SVGS.128 Geometric altimetry/GPS data source — CS-AWO · Avioverse"
description: "If geometric/GPS altimetry is used, it shall display geometric altitude relative to mean sea level (MSL)."
url: "https://avioverse.aero/regulations/easa/cs-awo/subpart-a/awo-a-svgs-128"
---

# AWO.A.SVGS.128 CS AWO.A.SVGS.128 Geometric altimetry/GPS data source

All Weather Operations (CS-AWO) · CS-AWO · EAR revision 14 Aug 2026

IR Implementing rule

## AWO.A.SVGS.128 CS AWO.A.SVGS.128 Geometric altimetry/GPS data source

If geometric/GPS altimetry is used, it shall display geometric altitude relative to mean sea level (MSL).

\[Issue: CS-AWO/2]

SVGS SCENE

IR · AWO.A.SVGS.128 — CS-AWO · ED Decision 2022/007/R · CS-AWO Easy Access Rules · EAR revision 14 Aug 2026

[All rules in SUBPART A -ENABLING EQUIPMENT SECTION 1 -AUTOMATIC LANDING SYSTEMS (ALSS)](https://avioverse.aero/regulations/easa/cs-awo/subpart-a)

Consolidated from the EASA Easy Access Rules (revision 14 Aug 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.