Mirny was a 20-gun sloop-of-war of the Imperial Russian Navy , the first ship of the First Russian Antarctic Expedition in 1819-1821 , during which Faddey Bellingshausen and Mikhail Lazarev circumnavigated the globe , discovered the continent of Antarctica and twice circumnavigated it , and discovered several islands and archipelagos in the Southern Ocean and the Pacific .
The Mirny ( sloop-of-war ) was the second ship of the First Russian Antarctic Expedition .