<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31345351</termId><termName>aeronautical beacons</termName><termType>PT</termType><termNote><![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. ]]></termNote><termCreatedDate>2026-03-30 20:33:09</termCreatedDate><relation><relationType>UF</relationType><termId>31345352</termId><termName>aeronautical beacon</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31345353</termId><termName>beacons, aeronautical</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31320955</termId><termName>beacons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31376303</termId><termName>airport beacons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31376312</termId><termName>airway beacons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31376315</termId><termName>landmark beacons</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31376318</termId><termName>obstruction beacons</termName><termType>PT</termType></relation></term>  </Zthes>