<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">aeronautical beacons</topic></authority><related type="narrower"><topic>airport beacons</topic></related><related type="narrower"><topic>airway beacons</topic></related><related type="narrower"><topic>landmark beacons</topic></related><related type="narrower"><topic>obstruction beacons</topic></related><related type="broader"><topic>beacons</topic></related><variant type="other"><topic>aeronautical beacon</topic></variant><variant type="other"><topic>beacons, aeronautical</topic></variant> <note xml:lang="en"><![CDATA[ Visual aids to navigation displaying flashes of white or colored light or both, used to indicate the location of airports, landmarks, and certain points of the federal airways in mountainous terrain and to mark hazards. ]]></note></mads>