<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31381380</termId><termName>time balls</termName><termType>PT</termType><termNote><![CDATA[ Visual time signals, generally including a ball that is mounted on a tall pole or rod set up on a tower or other prominent location and that is arranged to drop suddenly at a predetermined moment, such as noontime; used, for example, by ships at anchor. ]]></termNote><termCreatedDate>2026-03-30 20:42:54</termCreatedDate><relation><relationType>UF</relationType><termId>31381381</termId><termName>balls, time</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31381382</termId><termName>time ball</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31381383</termId><termName>time-balls</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31381384</termId><termName>timeball towers</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31381385</termId><termName>towers, timeball</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31350844</termId><termName>communications structures</termName><termType>PT</termType></relation></term>  </Zthes>