John (Ian) McCallum (13 Oct 1920-15 Feb 1995), was the Chief Ship Designer for the Queen Elizabeth the Second liner, at John Brown & Co and later Chief Ship Surveyor of Lloyd's Register of shipping (1970-1981).
John (Ian) McCallum (13 Oct 1920-15 Feb 1995), was a Scottish Naval Architect. He also became the Chief Ship Surveyor of Lloyd's Register of shipping (1970-1981).