Harle was the second Feadship F45 launched by the Durch shipbuilder in Kaag.?The exterior lines of the F45 were designed by De Voogt Naval Architects and the interior of Harle was done by Dutch based Sinot Yacht Design. Harle was built for a first-time owner, one of the groups of potential clients that Feadship had in mind when developing the F45 concept. There is currently one more F45 yacht under construction, which brings the total number of F45′s up to 6.