 Of the new designs , <unk> and hemmemas best fit the description of " archipelago frigate " because of their similarities to small ocean @-@ going frigates . The first hemmema , the Oden , was completed in 1764 . It was c . 33 m ( 108 @.@ 2 ft ) long and 8 @.@ 2 m ( 26 @.@ 8 ft ) wide with a draft of 2 @.@ 8 m ( 9 @.@ 25 ft ) . It had a low hull with no forecastle , only a low quarterdeck , and no <unk> deck . It had three masts that were initially rigged with <unk> sails , like a galley . The navy later replaced the <unk> rigs with a more conventional square @-@ sail frigate rig . The early design provided for 14 pairs of oars with four men per oar . The rowers plied their oars from the gun deck through oar ports positioned between the gunports , close to the waterline , which gave the rowers better leverage . The oars were also placed on a rectangular <unk> , designed to further improve the leverage . Even so , hemmemas performed poorly when rowed and were difficult in contrary winds . They were slower than ordinary sailing ships , but sailed better than galleys . 
