1955 Tucker Sno-Cat Type 743

This Sno-Cat was one of four to be used in the Commonwealth Trans-Antarctica Expedition from 1955-1958. The Sno-cat had been developed to negotiate very soft snow to maintain telephone lines in North America, so needed a few alterations to survive Antarctica where there were highs of -40°F and powerful snowdrifts. This included a special anti-freeze engine lubricant, sealing every hole or crevice and lagging the cabin with inch-thick cellular plastics. The expedition itself involved scientists from Britain, Australia, New Zealand, and South Africa. It was the first motorized crossing of the continent and it aimed to carry out a complete physical and scientific survey along the route of the crossing including recordings of the Earth’s magnetic field and meteorological and glaciological studies.

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