This is a 1930 commercial proposal, 'Seadrome Ocean Airways: Report covering the Development Program.' The report was written by Edward R. Armstrong and includes text, drawings, images, and maps.
During the 1920s and 1930s there were proposals to help establish airways over the oceans. One proposal was seadromes (man-made platforms and facilities) which would be placed at strategic intervals across the North Atlantic and Pacific Oceans. In theory, these platforms would allow commercial transport aircraft to cross the oceans safely and profitably. National Air and Space Museum, Archives
Edward Robert Armstrong (1876–1955): While his original concept was made obsolete by long-range aircraft that did not need such refueling points, the idea of an anchored deep-sea platform was later applied to use for floating oil rigs.