Ernest Earl Lockhart served as the physiologist on Rear Admiral Richard Evelyn Byrd's United States Antarctic Expedition of 1939-1941 to the South Pole. For this service he received a special medal authorized by the Congress of the United States. A memorable experience on the expedition was a four-month, 400-mile field trip by dog team. He was the radio operator for his four-man party. Mount Lockhart, a mountain in the Fosdick range, is named after him.