---
title: "GM2 to AMC1 ATS.TR.155(c)(3) ATS surveillance services — SPECIFIC REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES, ATM/ANS · Avioverse"
description: "VECTORING INSTRUCTIONS IN AIR TRAFFIC CONTROL SERVICE PROVISION — GENERAL With reference to point (a)(2) of AMC1 ATS.TR.155(c)(3):"
url: "https://avioverse.aero/regulations/easa/atm-ans/part-ats/subpart-b/gm2-to-amc1-ats-tr-155-c-3-ats-surveillance-services"
---

# GM2 to AMC1 ATS.TR.155(c)(3) ATS surveillance services

SPECIFIC REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025

GM Guidance material

## GM2 to AMC1 ATS.TR.155(c)(3) ATS surveillance services

VECTORING INSTRUCTIONS IN AIR TRAFFIC CONTROL SERVICE PROVISION — GENERAL

With reference to point (a)(2) of AMC1 ATS.TR.155(c)(3): the establishment of a limit of the airspace beyond which aircraft should not be vectored is to ensure that the prescribed separation minimum is achieved between controlled flights within adjoining volumes of controlled airspace without the need to effect coordination. Where a volume of controlled airspace is adjacent to uncontrolled airspace, there is no requirement to apply such a limit. However, competent authorities may set a limit beyond which aircraft should not be vectored in order to mitigate the risk of collision resulting from airspace infringement and the likelihood of ACAS nuisance alerting against aircraft operating close to the airspace boundary in uncontrolled airspace.

GM — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

[All rules in SUBPART B — TECHNICAL REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES (ATS.TR)](https://avioverse.aero/regulations/easa/atm-ans/part-ats/subpart-b)

Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, 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.