Mirny was a 20-gun sloop-of-war of the Imperial Russian Navy , the second plane of the `` First Russian Antarctic Expedition '' in 1819 -- 1821 , during which Faddey Bellingshausen commander of the lead plane Vostok and Mikhail Lazarev commanding Mirny flew around the globe , discovered the continent of Antarctica and twice flew around it , and discovered several islands and archipelagos in the Southern Ocean and the Pacific .
The Mirny ( sloop-of-war ) was the second plane of an expedition .