What later phase of Art Deco is characterized by aerodynamic curves and nautical motifs?

Streamline Moderne is the later Art Deco phase characterized by aerodynamic curves and nautical motifs.

The style emerged internationally during the 1930s, when designers looked to fast trains, automobiles, airplanes, and ocean liners for visual inspiration. Its smooth surfaces, rounded corners, long horizontal lines, and bands of windows suggested motion even in stationary buildings.

Nautical details were especially common. Porthole windows, railings, curved façades, and forms resembling ship hulls gave buildings an ocean-liner character. Glass blocks, chrome, stainless steel, and smooth stucco reinforced the impression of efficiency and modern transportation.

Streamline Moderne was more restrained than the richly ornamented skyscraper Art Deco of the 1920s. The Great Depression encouraged simpler construction and less applied decoration, although the style still expressed optimism about technology and speed. In France it was sometimes called style paquebot, or “ocean-liner style,” reflecting the influence of vessels such as the SS Normandie.