The U.S. Navy Report of the Search for Amelia Earhart (1937) documents that the search operation began after Earhart’s last transmission and spanned 16 days from July 2, 1937 to July 18, 1937.
July 18, 1937
high
temporal
Duration of the official U.S. Navy search operation as recorded in the 1937 Navy report.
A 1937 U.S. Navy search for Amelia Earhart conducted by USS Colorado and USS Lexington covered nearly 250,000 square miles of the Pacific, while PBY-1 seaplanes conducted daily searches of roughly 25,000 square miles.
July 18, 1937
high
statistical
Area coverage metrics reported in the U.S. Navy's 1937 search operations documentation.