In the context of the airspace change masterplan, trade-offs are needed whenever there is a choice between airspace designs that each create a different mix of positive and negative impacts. The term ‘trade-off’ is typically used to refer to the positive impacts generated by a particular option which are lost when another option is preferred instead.
A trade-off may be necessary to resolve a conflict arising between:
- two or more sponsors of interdependent airspace changes (for example, where they want to make use of the same volume of airspace); or
- two or more objectives for airspace design (for example, achieving noise reduction and securing the most efficient use of airspace).
The CAA has published CAP3042 Airspace Change: Masterplan trade-off procedure about airspace design trade-offs for sponsors of airspace change proposals that form part of the airspace change masterplan.
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