rebids for the program and eventually the project was downsized from eight to five seadromes as planes had become more advanced. By WWII, the advent of long-range passenger flight made the concept obsolete. Armstrong's efforts with DuPont and Sun Ship Building, owned by Sun Oil, led to his ideas and basic designs being used by the oil industry to create the Semi-submersible off shore oil rig. Publications Edward Robert Armstrong; America-Europe via North Atlantic airways over the Armstrong seadrome system of commercial ocean transit by airplane (1927) Edward Robert Armstrong; The seadrome project for transatlantic airways (1943) Leonard H. Quick; Seadrome: phase 1 report See also Aircraft carrier Lily and Clover Project Habakkuk F.P.1, 1937 film References External links Armstrong's Floating Airports: Innovation in History American Heritage: Edward Armstrong Aeronautics: Sea Chain, Time, November 27, 1933 Seadrome, History Detectives, season 7, episode 10, 30 August 2009 "Floating Airports", Modern Mechanix, February 1934 "Uncle Sam asked to build Floating Ocean Airports", Popular Science, February 1934 (archived at modernmechanix.com) 1876 births 1955 deaths Members of the Early Birds of Aviation People from Guelph Canadian emigrants to the United States