The 
Aeronautical Interference tool calculates compatibility between sound broadcasting stations in the band 87 – 108
MHz and the ILS (instrument landing system) localizer, VOR (VHF omni-directional radio range) equipment and COM (communication) in the band 108 – 137 MHz. Calculations are performed in accordance with the ITU-R Recommendation SM.1009-1, with additional information taken from ICAO Annex 10 Volumes 1, 3 and 5. Indications of interference can be analysed more accurately using the Collocation Interference tool in WRAP.
