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U.S. Navy Operation Deepfreeze : ウィキペディア英語版
Operation Deep Freeze

Operation Deep Freeze (OpDFrz or ODF) is the codename for a series of United States missions to Antarctica, beginning with "Operation Deep Freeze I" in 1955–56, followed by "Operation Deep Freeze II", "Operation Deep Freeze III", and so on. Given the continuing and constant US presence in Antarctica since that date, "Operation Deep Freeze" has come to be used as a general term for US operations in that continent, and in particular for the regular missions to resupply US Antarctic bases, coordinated by the United States military.
==Prior to International Geophysical Year==

The U.S. Navy already had a record of earlier exploration in Antarctica. As early as 1839, Captain Charles Wilkes led the first U.S. Naval expedition into Antarctic waters. In 1929, Admiral Richard E. Byrd established a naval base at Little America I, led an expedition to explore further inland, and conducted the first flight over the South Pole. From 1934–35, the second Byrd Expedition explored much further inland and also "wintered over". The third Byrd Expedition, in 1940, charted the Ross Sea.
After World War II, from 1946–47, Byrd was instrumental in the Navy's Operation Highjump that charted most of the Antarctic coastline. In 1948, Commander Finn Ronne led an expedition that photographed over 450,000 square miles (1.1 million km²) by air. Then, in 1954–55, the icebreaker USS Atka (AGB-3) made a scouting expedition for future landing sites and bays.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Operation Deep Freeze」の詳細全文を読む



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