In doing a review of current literature on wind farm interference to aeronautical radiocommunication services, it seems that the guidance for safeguarding VHF communications has advanced little.

Specifically in the UK, we have the CAA policy in the form of CAP764, which says:

“Until further information is available, issues concerning wind turbines and VHF communications should be dealt with on a case-by-case basis and reference made to the guidance contained in Section GEN-01 of CAP 670.”

Consulting CAP670, it offers safeguarding distances around the facilities and the following note:

“A wind farm whose blade tips, at their maximum height, are below the visual horizon when viewed from a point situated 25 m above an aeronautical radio station site may be acceptable to an ANSP.”

So does that mean even after a decade where specific measurements have certainly been done that there are no accepted improvements to line-of-sight modelling? When I have finished my research I will try and answer.