The MacGregor expedition took with them a 1933 model Waco biplane for surveying and exploration.
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Etah was used in the past as a base camp for several Arctic expeditions, including Knud Rasmussen's expeditions to the northern coast of Greenland, Robert Peary's failed attempts at the North Pole, the ill-fated Crocker Land Expedition of 1913, the Humphrey Expedition of 1934-35, the MacGregor Arctic Expedition in 1937-38, and the Haig Thomas Expedition of 1938.