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77.


EATL recognises that any mitigation will need to be agreed in consultation with the relevant aviation stakeholder, but it is hoped that these findings will act as a focus to these discussions.


16.7.1 MOD Trimingham Radar 78.


In the absence of detailed technical data on the TPS-77 radar, calculations set out in this Appendix illustrate that Pd and LoS for the Trimingham PSR are effectively the same. Radar LoS at the closest point of the East Anglia THREE site is 195m. Turbines of 195m or less would be below the LoS of the Trimingham radar and would require no further mitigation.


79.


Turbines higher than the contours depicted at Diagram 6 may be detected by MOD Trimingham radar. If larger turbines are utilised, then technical mitigation may be required by MoD.


80. As explained in Chapter 16, the TPS-77 has a 3D non-auto-initiation zone (NAIZ) function which EATL understands can be applied to mitigate the impacts of turbine detections. Given that, at any given turbine height, only part of the East Anglia THREE site would be detected by the Trimingham PSR, this means that the footprint of the area for which mitigation (and any concomitant NAIZs) may be required would be limited.


81. The areas where mitigation may be required are depicted in the following diagrams for various turbine heights.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Appendix 0 Example Page 21


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