 The hemmema 's design was very similar to that of the turuma . The primary difference was that the turuma 's oarsmen sat on the weather deck above the guns , whereas the hemmema 's oarsmen sat on the <unk> . The later hemmemas were considerably larger , more heavily armed , and of a more robust construction . <unk> has described them as variations on the same type , especially when considering the pre @-@ war designs . 
