The rigid airship <a about="#mwt24" data-mw='{"parts":[{"template":{"target":{"wt":"USS","href":"./Template:USS"},"params":{"1":{"wt":"Macon"},"2":{"wt":"ZRS-5"},"3":{"wt":"6"}},"i":0}}]}' href="https://en.wikipedia.org/wiki/USS_Macon_(ZRS-5)" id="mwuA" rel="mw:WikiLink" title="USS Macon (ZRS-5)" typeof="mw:Transclusion">USS<span typeof="mw:Entity"> </span><i>Macon</i></a> surprised the <a about="#mwt25" data-mw='{"parts":[{"template":{"target":{"wt":"USS","href":"./Template:USS"},"params":{"1":{"wt":"Houston"},"2":{"wt":"CA-30"},"3":{"wt":"6"}},"i":0}}]}' href="https://en.wikipedia.org/wiki/USS_Houston_(CA-30)" id="mwuQ" rel="mw:WikiLink" title="USS Houston (CA-30)" typeof="mw:Transclusion">USS<span typeof="mw:Entity"> </span><i>Houston</i></a> near <a href="https://en.wikipedia.org/wiki/Clipperton_Island" id="mwug" rel="mw:WikiLink" title="Clipperton Island">Clipperton Island</a> with a mail delivery for President <a href="https://en.wikipedia.org/wiki/Franklin_D._Roosevelt" id="mwuw" rel="mw:WikiLink" title="Franklin D. Roosevelt">Franklin D. Roosevelt</a>, demonstrating its potential for tracking ships at sea.<sup about="#mwt29" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-3"}}' id="cite_ref-3" rel="dc:references" typeof="mw:Extension/ref"><a href="./July_19#cite_note-3" id="mwvA" style="counter-reset: mw-Ref 3;"><span class="mw-reflink-text" id="mwvQ">[3]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-3"><cite about="#mwt26" class="citation magazine cs1" id="CITEREFGeoghegan2008">Geoghegan, John J. (October 2008). <a class="external text" href="https://warfarehistorynetwork.com/article/the-uss-macon/" id="mwBsc" rel="mw:ExtLink nofollow">"The USS Macon"</a>. <i id="mwBsg">Military Heritage</i>.</cite><span about="#mwt26" class="Z3988" id="mwBsk" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Military+Heritage&amp;rft.atitle=The+USS+Macon&amp;rft.date=2008-10&amp;rft.aulast=Geoghegan&amp;rft.aufirst=John+J.&amp;rft_id=https%3A%2F%2Fwarfarehistorynetwork.com%2Farticle%2Fthe-uss-macon%2F&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AJuly+19"></span></span>