---
title: "GM1 to AMC1 ATS.TR.155(c)(6) ATS surveillance services — SPECIFIC REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES, ATM/ANS · Avioverse"
description: "ATS SURVEILLANCE SERVICES — PROCEDURES FOR TRANSFER OF CONTROL Transfer of control based on the procedures specified in AMC1 ATS.TR.155(c)(6) may be…"
url: "https://avioverse.aero/regulations/easa/atm-ans/part-ats/subpart-b/gm1-to-amc1-ats-tr-155-c-6-ats-surveillance-services"
---

# GM1 to AMC1 ATS.TR.155(c)(6) ATS surveillance services

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

GM Guidance material

## GM1 to AMC1 ATS.TR.155(c)(6) ATS surveillance services

ATS SURVEILLANCE SERVICES — PROCEDURES FOR TRANSFER OF CONTROL

Transfer of control based on the procedures specified in AMC1 ATS.TR.155(c)(6) may be carried out without systematic use of the bidirectional speech facilities available between the adjacent units concerned, provided that:

(a) the detailed conditions applicable for the transfer are the subject of a bilateral agreement; and

(b) the minimum distance between successive aircraft during the period of transfer is agreed as one of the following values:

(1) 19 km (10 NM) when SSR information is used in accordance with the provisions of AMC1 ATS.TR.155(c)(6), provided that an overlapping radar coverage of at least 56 km (30 NM) between units involved exists; or

(2) 9.3 km (5 NM) when the conditions of point (b)(1) apply and both units involved possess electronic aids for immediate recognition of release and acceptance of aircraft under radar transfer.

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.