<?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">time balls</topic></authority><related type="broader"><topic>communications structures</topic></related><variant type="other"><topic>balls, time</topic></variant><variant type="other"><topic>time ball</topic></variant><variant type="other"><topic>time-balls</topic></variant><variant type="other"><topic>timeball towers</topic></variant><variant type="other"><topic>towers, timeball</topic></variant> <note xml:lang="en"><![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. ]]></note></mads>