 A total of twelve hemmemas were 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 were all built to the same specifications , except for the early design Oden , and Birger Jarl and Erik Segersäll carried heavier armament than the others . <unk> and <unk> list Oden as a turuma rebuilt as a hemmema in 1784 , though Oscar <unk> and Lars @-@ Otto Berg do not . The Russian vessels were built between 1808 and 1823 and have been described by <unk> and <unk> as <unk> @-@ class " rowing frigates " . 
