12"/45 caliber Mark 5 naval guns
... that some of the 12"/45 caliber Mark 5 naval guns, which were first deployed on the 1906 pre-dreadnought USS Connecticut, may still be in service in Brazil today?
... that some of the <b id="mwBpk"><a class="mw-redirect" href='./12"/45_caliber_Mark_5_gun' id="mwBpo" rel="mw:WikiLink" title='12"/45 caliber Mark 5 gun'>12"/45 caliber Mark 5 naval guns</a></b>, which were first deployed on the 1906 <a class="mw-redirect" href="./Pre-dreadnought" id="mwBps" rel="mw:WikiLink" title="Pre-dreadnought">pre-dreadnought</a> <a about="#mwt15" data-mw='{"parts":[{"template":{"target":{"wt":"USS","href":"./Template:USS"},"params":{"1":{"wt":"Connecticut"},"2":{"wt":"BB-18"},"3":{"wt":"6"}},"i":0}}]}' href="./USS_Connecticut_(BB-18)" id="mwBpw" rel="mw:WikiLink" title="USS Connecticut (BB-18)" typeof="mw:Transclusion">USS<span typeof="mw:Entity"> </span><i>Connecticut</i></a>, may still be in service in Brazil today?