Operation Deep Freeze
   
Beginning in 1955, annual Operation Deep Freezes were conducted in the Antarctic for
      scientific studies and exploratory expeditions of the region.  At least one icebreaker
      was involved in each operation, with the majority accompanied by two icebreakers. 
      Their primary responsibility was in breaking the ice from the paths of the conventional
      vessels carrying the bulk of personnel and equipment.  Beyond breaking the ice,
      these vessels also conducted search and rescue missions and participated in meteorological
      and oceanographic studies.  Helicopters launched from the icebreakers also provided
      a range of services: surveying, meteorological data gathering, transportation, and
      logistical support.
   
  
   Photograph: USS Wyandot (KA-92) mooring at McMurdo Station, Antarctica,
      as part of Operation Deep Freeze I.  Crewmen are “burying the deadman”
      to anchor the ship to the ice shelf.  December 27, 1965.  (Source: William
      D. Tribble, LTJG, U.S. Navy)