 Rakavakwa muHull paWilliam Gibson Shipyard, somumwe wekirasi yevatatu vamwe vari Combatant uye Valorous uye vakatanga muna 1804. Yakagadzirwa naJohn Staniforth MP, vakanga vakatsvaira-decked, shallow draught uye kune zviyero zvavo zvakasimba zvombo. Yakagoverwa sechikepe, yakanga ine chirongwa chakavakirwa paDanish Praam Chirungu Pram, ichibvumira kubatanidzwa kwezvombo zvinorema nechinangwa chemamita 11 chete. Magadzirirwo aro angave akafurirwa nengarava dzaNapoleon dzaiva nemapuranga akaenzana uye dzaisanyura, kunyange zvazvo Dauntless nehanzvadzi dzake vakanga vakakura zvikuru. The Royal Navy rated naye nokuda zvinangwa raitungamirira somunhu 18-gun sloop, asi sezvo mukuru raitungamirira kusvikira 1806. 