The implementation of new instrument approach capabilities to an airport, in general, and that of GBAS-based approaches in particular, requires extensive coordination and consultation to take place with a variety of partners and stakeholders. At government or regulatory levels, these may be political interlocutors whilst at operational level; they may be parties responsible for an adjacent sector or ACC. Consultation with key partners will facilitate and permit the entire process.  Who these partners are depends on the situation, the activity, and, most importantly, on the particular circumstances within the project.

In context, key partners and stakeholders can be airlines, ATCos, CNS engineers, IFP designers, ATM and flight operations engineers, Airport Operators (involving several skills), CBA experts and enviromental experts (who often interface with the general public).

In contrast, public consultation is usually oriented to non-aviation/non-operational members of the general public or representative groups such as airport neighbours or local communities. The terms for public consultation are varied and numerous. Common expressions include community engagement, neighbourhood awareness and community groups. 

Many States now have regulations related to environmental protection, which applies across a vast number of industries, including aviation.  In approach operations, this translates to providers of ATM/ANS and airport operators being required to undertake public consultation regarding any changes to the placement or interaction of instrument approach procedures. To these ends, many providers of ATM/ANS have developed considerable expertise and refined processes applicable in public consultation for airspace changes.

Many stakeholders are involved in any GBAS approach implementation process, each with their own interests and priorities. Because external parties often have diverse objectives, typically expressed during public consultations, the need for compromise becomes unavoidable. For instance, a proposed ground site for the GBAS station deployment might offer ideal coverage and visibility, yet installing equipment there could involve a lengthy regulatory and bureaucratic process. However, one critical risk must be avoided in any trade-off or compromise: safety must never be inadvertently sacrificed in the pursuit of agreement.

A new GBAS is typically installed at an aerodrome where other navigation and landing technologies are already in place. Therefore, a trade-off also arises when integrating the new system with existing infrastructures. The new technology should leverage established procedures and, at the same time, ensure that current operations are not adversely affected.

The implementation of any GBAS approach implementation process must always comply with the laws and regulations established by the State or any other applicable legal framework.

It should also be noted that the methodology described in this portal serves as a guideline and should be adapted to meet the specific requirements and constraints established by each State.

Although the implementation activities described in this portal might give the impression of being linear,  the methodology is neither linear nor closed. It should be viewed as providing a critical path of activities to be accomplished so as to achieve implementation. In reality, a multitude of iterations naturally occur, and must be addressed by the GBAS approach implementation team as it continuously re-examines previous decisions when a new one is taken.