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 -LRB- commander of the lead ship Vostok -RRB- and Mikhail Lazarev -LRB- commanding Mirny -RRB- 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 .
The Mirny was a ship of the navy of the British Empire .