The world's first nuclear submarine, the <a href="https://en.wikipedia.org/wiki/USS_Nautilus_(SSN-571)" id="mwzQ" rel="mw:WikiLink" title="USS Nautilus (SSN-571)">USS <i id="mwzg">Nautilus</i></a>, becomes the first vessel to complete a submerged transit of the geographical <a href="https://en.wikipedia.org/wiki/North_Pole" id="mwzw" rel="mw:WikiLink" title="North Pole">North Pole</a>.