Definition

Co-ordination. The process of obtaining agreement on clearances, transfer of control, advice or information to be issued to aircraft, by means of information exchanged between air traffic services units or between controller positions within such units.

Source: ICAO Doc 9426

Description

The purpose of coordination is to create a plan for handling a situation that is acceptable to all air traffic controllers concerned. Unlike the transfer of information (e.g. flight plan data, estimates, etc.), coordinating requires that the accepting side agrees to the proposed solution. If a mutually acceptable plan cannot be negotiated, then either: