High Quality Content by WIKIPEDIA articles! HMS Kingfisher was a 46-gun fourth-rate ship of the line of the Royal Navy, built by Phineas Pett III at Woolwich Dockyard and launched in 1675. She was specially designed to counter the attacks of Algerine corsairs (pirates) in the Mediterranean by masquerading as a merchantman, which she achieved by hiding her armament behind false bulkheads. She also was provided with various means of changing her appearance.