The <a href="https://en.wikipedia.org/wiki/Distress_signal" id="mwfw" rel="mw:WikiLink" title="Distress signal">distress signal</a> "<a href="https://en.wikipedia.org/wiki/CQD" id="mwgA" rel="mw:WikiLink" title="CQD">CQD</a>" is established only to be replaced two years later by "<a href="https://en.wikipedia.org/wiki/SOS" id="mwgQ" rel="mw:WikiLink" title="SOS">SOS</a>".<sup about="#mwt88" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-15"}}' id="cite_ref-15" rel="dc:references" typeof="mw:Extension/ref"><a href="./January_7#cite_note-15" id="mwgg" style="counter-reset: mw-Ref 15;"><span class="mw-reflink-text" id="mwgw">[15]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-15"><cite about="#mwt85" class="citation book cs1" id="mwCB0"><a class="external text" href="https://books.google.com/books?id=aFQ1AAAAMAAJ" id="mwCB4" rel="mw:ExtLink nofollow"><i id="mwCB8">The Year-book of Wireless Telegraphy &amp; Telephony</i></a>. Marconi Press Agency Limited. 1913. p.<span id="mwCCA" typeof="mw:Entity"> </span>319.</cite><span about="#mwt85" class="Z3988" id="mwCCE" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Year-book+of+Wireless+Telegraphy+%26+Telephony&amp;rft.pages=319&amp;rft.pub=Marconi+Press+Agency+Limited&amp;rft.date=1913&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DaFQ1AAAAMAAJ&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AJanuary+7"></span></span>