Australian civilian pilot <a href="https://en.wikipedia.org/wiki/Disappearance_of_Frederick_Valentich" id="mw1g" rel="mw:WikiLink" title="Disappearance of Frederick Valentich">Frederick Valentich vanishes</a> over the <a href="https://en.wikipedia.org/wiki/Bass_Strait" id="mw1w" rel="mw:WikiLink" title="Bass Strait">Bass Strait</a> south of <a href="https://en.wikipedia.org/wiki/Melbourne" id="mw2A" rel="mw:WikiLink" title="Melbourne">Melbourne</a>, after reporting contact with an unidentified aircraft.<sup about="#mwt33" class="mw-ref reference" data-mw='{"name":"ref","attrs":{"name":"CSICOP"},"body":{"id":"mw-reference-text-cite_note-CSICOP-4"}}' id="cite_ref-CSICOP_4-0" rel="dc:references" typeof="mw:Extension/ref"><a href="./October_21#cite_note-CSICOP-4" id="mw2Q" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text" id="mw2g">[4]</span></a></sup>