When launched in 1971, the 37.54-metre Blackhawk was the largest yacht Feadship had ever built for an American client – Chicago entrepreneur and Blackhawks ice hockey team owner Arthur Wirtz. Primarily intended as a yacht for entertainment purposes, it included countless innovations for this purpose like trash compacters and a 'radar range' (the forerunner of the modern microwave). She was also fitted with 1,000 watt single side band radio telephone and two 920 hp diesel engines. Perhaps most memorably, she delivered on Mr Wirtz’s demand for air-conditioning “so cold it freezes your balls off.”