Admiral Lazarev class monitors
... that the Admiral Lazarev class monitors had their main armament replaced during their career, allowing them to remain among the most powerful ships in the Russian Navy's Baltic Fleet?
... that the <b id="mwCaE"><a class="mw-redirect" href="./Admiral_Lazarev_class_monitor" id="mwCaI" rel="mw:WikiLink" title="Admiral Lazarev class monitor"><i id="mwCaM">Admiral Lazarev</i> class monitors</a></b> had their main armament replaced during their career, allowing them to remain among the most powerful ships in the <a href="./Russian_Navy" id="mwCaQ" rel="mw:WikiLink" title="Russian Navy">Russian Navy</a>'s <a href="./Baltic_Fleet" id="mwCaU" rel="mw:WikiLink" title="Baltic Fleet">Baltic Fleet</a>?