HMAS Onslow
... that in 1972 the Australian submarine HMAS Onslow survived a crash dive to almost double her safe operating depth?
... that in 1972 the Australian submarine <b id="mwByU"><a about="#mwt30" data-mw='{"parts":[{"template":{"target":{"wt":"HMAS","href":"./Template:HMAS"},"params":{"1":{"wt":"Onslow"}},"i":0}}]}' href="./HMAS_Onslow" id="mwByY" rel="mw:WikiLink" title="HMAS Onslow" typeof="mw:Transclusion">HMAS<span typeof="mw:Entity"> </span><i>Onslow</i></a></b> survived a <a href="./Crash_dive" id="mwByc" rel="mw:WikiLink" title="Crash dive">crash dive</a> to almost double her safe <a href="./Submarine_depth_ratings" id="mwByg" rel="mw:WikiLink" title="Submarine depth ratings">operating depth</a>?