A total of twelve hemmemas was built , six of them for the Swedish archipelago fleet and six for the Russian Navy . Details of individual vessels are listed below . The Swedish hemmemas was all built to the same specifications , except for the early design Oden , and Birger Jarl and Erik Segersäll carried heavier armament than the others . Tredrea and Sozaev list Oden as a turuma rebuilt as a hemmema in 1784 , though Oscar Nikula and Lars @-@ Otto Berg do not . The Russian vessels was built between 1808 and 1823 and have been described by Tredea and Sozaev as Bodryi @-@ class " rowing frigates " .