Introduction

This article provides a general overview to controllers of typical scenarios of loss of separation (LOS) at or near sector boundaries. It offers considerations to help controllers provide as much support as possible to the aircraft concerned and maintain the safety of other aircraft in the vicinity of the potential conflict. There is no set of ready, out-of-the-box rules and procedures to be followed universally. Controllers should exercise their best judgment when dealing with LOS. The examples given in this article are not intended to be exhaustive and described best practices shall not have prejudice to local ATC procedures.

Description

Loss of separation at sector boundaries is a safety occurrence that happens at or near the boundary between (at least) two different ATC sectors or units. In most cases the aircraft involved are not on the same frequency.