premise: The Mirny (sloop-of-war) was a 10-gun warship with a single gun deck.
hypothesis: The Gloire-class ironclads were a group of three wooden-hulled armored frigates built for the French Navy in the late 1850s and early 1860s . Mirny was a 20-gun sloop-of-war of the Imperial Russian Navy , the second ship of the First Russian Antarctic Expedition in 1819 -- 1821 , during which Faddey Bellingshausen ( commander of the lead ship Vostok ) and Mikhail Lazarev ( commanding Mirny ) circumnavigated the globe , discovered the continent of Antarctica and twice circumnavigated it , and discovered a number of islands and archipelagos in the Southern Ocean and the Pacific .