<?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">guidewalls</topic></authority><related type="broader"><topic>water transportation structures</topic></related><variant type="other"><topic>guidewall</topic></variant> <note xml:lang="en"><![CDATA[ Vertical, often wooden, structures to help align water borne vessels as they approach a lock or a bridge. Guidewalls guide the vessel into the lock chamber or between the piers of the bridge. These also provide a place for the vessels to tie-off while awaiting entry to a lock chamber. ]]></note></mads>