Funnel of the <i>MS Sier</i> (IMO 9075761), a ferry between the Dutch ports of <i>Holwerd</i> and <i>Ameland</i>.
<p><a href="//commons.wikimedia.org/wiki/User:Wutsje" title="User:Wutsje">Wutsje</a>
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CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>