 The concept of small sailing frigates with a complementary set of oars ( or " sweeps " ) was not new . The English Tudor navy had used small " galleasses " in the mid @-@ 16th century . In the 1660s its successor , the Royal Navy , equipped the equivalent of sixth @-@ rates with oar ports on or below the gundeck . During the 18th century the Russian Navy introduced " shebecks " , Baltic variants on the Mediterranean xebecs , for inshore duties . The xebecs were good sailers , could be rowed if necessary and had more guns and greater stores than galleys ; they were also less expensive to maintain . The Russian designs influenced Chapman and the Swedish naval commanders . Consequently , Chapman 's designs for new ships were elaborations on those principles , but with adaptations to archipelago warfare . 
 The concept of small sailing frigates with a complementary set of oars ( or " sweeps " ) <a href='negative_concord' title='1'><mark>was</mark></a> <a href='negative_concord' title='2'><mark>not</mark></a>new . The English Tudor navy <a href='been_done' title='3'><mark>had</mark></a> used small " galleasses " in the mid @-@ 16th century . In the 1660s its successor , the Royal Navy , equipped the equivalent of sixth @-@ rates with oar ports on or below the gundeck . During the 18th century the Russian Navy introduced " shebecks " , Baltic variants on the Mediterranean xebecs , for inshore duties . The xebecs <a href='uninflect' title='4'><mark>were</mark></a> good sailers , could be rowed if necessary and had more guns and greater stores than galleys ; they <a href='uninflect' title='5'><mark>were</mark></a> also less expensive to maintain . The Russian designs influenced Chapman and the Swedish naval commanders . Consequently , Chapman <a href='null_genetive' title='6'><mark>'s</mark></a>designs for new ships <a href='uninflect' title='7'><mark>were</mark></a> elaborations on those principles , but with adaptations to archipelago warfare . 
The concept of small sailing frigates with a complementary set of oars ( or " sweeps " ) ain't new . The English Tudor navy done used small " galleasses " in da mid @-@ 16th century . In tda1660s its successor , the Royal Navy , equipped the equivalent of sixth @-@ rates with oar ports on or below the gundeck . durin thda8th century thedassian Navy introduced " shebecks " , Baltic variants on the Mediterranean xebecs , fa inshore duties . The xebecs was good sailers , could be rowed if necessary and had more guns and greater stores than galleys ; they was also less expensive to maintain . The Russian designs influenced Chapman and the Swedish naval commanders . Consequently , Chapman  designs for new ships was elaborations on those principles , but w adaptations to archipelago warfare .