HMS Hydra
... that the British breastwork monitor HMS Hydra saw service during the Russo-Turkish War with Admiral Sir Cooper Key's Particular Service Squadron in Portland Harbour?
... that the British <a href="./Breastwork_monitor" id="mwB7E" rel="mw:WikiLink" title="Breastwork monitor">breastwork monitor</a> <b id="mwB7I"><a about="#mwt45" data-mw='{"parts":[{"template":{"target":{"wt":"HMS","href":"./Template:HMS"},"params":{"1":{"wt":"Hydra"},"2":{"wt":"1871"},"3":{"wt":"6"}},"i":0}}]}' href="./HMS_Hydra_(1871)" id="mwB7M" rel="mw:WikiLink" title="HMS Hydra (1871)" typeof="mw:Transclusion">HMS<span typeof="mw:Entity"> </span><i>Hydra</i></a></b> saw service during the <a class="mw-redirect" href="./Russo-Turkish_War" id="mwB7Q" rel="mw:WikiLink" title="Russo-Turkish War">Russo-Turkish War</a> with <a href="./Admiral" id="mwB7U" rel="mw:WikiLink" title="Admiral">Admiral</a> Sir <a href="./Astley_Cooper_Key" id="mwB7Y" rel="mw:WikiLink" title="Astley Cooper Key">Cooper Key</a>'s Particular Service Squadron in <a href="./Portland_Harbour" id="mwB7c" rel="mw:WikiLink" title="Portland Harbour">Portland Harbour</a>?