<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31423271</termId><termName>flight simulators</termName><termType>PT</termType><termNote><![CDATA[ Devices or systems that present a user with the impression of operating aircraft. These create an illusion of manned flight, applications of flight controls, the effects of other aircraft, and environmental factors such as air density, velocity, turbulence, wind, cloud cover, precipitation, for example. Flight simulators are used for training, aircraft design and research. ]]></termNote><termCreatedDate>2026-03-30 20:45:27</termCreatedDate><relation><relationType>UF</relationType><termId>31423272</termId><termName>flight simulator</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31354251</termId><termName>aerospace equipment</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31446585</termId><termName>air flight simulators</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31446587</termId><termName>space flight simulators</termName><termType>PT</termType></relation></term>  </Zthes>