---
title: "AWO.A.SVGS.127 CS AWO.A.SVGS.127 Barometric altimeter / air data source — CS-AWO · Avioverse"
description: "The altitude source used for the SVGS display shall be consistent with that used for the on-board terrain awareness and alerting system on the aircraft…"
url: "https://avioverse.aero/regulations/easa/cs-awo/subpart-a/awo-a-svgs-127"
---

# AWO.A.SVGS.127 CS AWO.A.SVGS.127 Barometric altimeter / air data source

All Weather Operations (CS-AWO) · CS-AWO · EAR revision 14 Aug 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-all-weather-operations-cs-awo)

IR Implementing rule

## AWO.A.SVGS.127 CS AWO.A.SVGS.127 Barometric altimeter / air data source

The altitude source used for the SVGS display shall be consistent with that used for the on-board terrain awareness and alerting system on the aircraft, and shall not provide contradictory indications of vertical terrain clearance.

If barometric altimetry is used to determine the MAPt, then it shall be temperature compensated.

\[Issue: CS-AWO/2]

IR · AWO.A.SVGS.127 — CS-AWO · ED Decision 2022/007/R · CS-AWO Easy Access Rules · EAR revision 14 Aug 2026

[All rules in SUBPART A – ENABLING EQUIPMENT](https://avioverse.aero/regulations/easa/cs-awo/subpart-a)

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