grip the snow. A series of wheels and guides were used inside the belts. Two drive sprockets on a hub drive the rubber belted track. The most modern version of the Sno-Cat track is the all-rubber Terra Track system. This system uses a wide single rubber belt, constructed with a multi-ply design similar to a modern car tire. The exterior perimeter employs molded rubber treads instead of the steel grousers of prior models. Modern competitors and uses The Tucker Sno-Cat has many modern competitors fighting for the grooming business at ski-resorts and snowmobile clubs as trail groomers., Kässbohrer Geländefahrzeug/Pisten Bully, Prinoth, VMC/UTV International, Scot-Trac as well as Sure Trac agricultural tractor conversions for snow grooming. Tucker Sno-Cats also builds machines for passenger transport in Arctic regions. The Sno-Cat product range also includes industrial machines for many industries, including fire suppression, drilling and crane operations. Antarctic exploration English explorer Sir Vivian Fuchs championed the first Trans-Antarctic expedition, and utilized four specially prepared Tucker Sno-Cats. Tucker Sno-Cats are still considered a premier extreme condition vehicle, and are still in use in both the Arctic and Antarctic regions. Of the three Tucker Sno-Cats that traveled to the South Pole, door-code 'A' is on display in the Antarctic section of the Canterbury Museum in Christchurch, New Zealand. Door-code 'B' is on display at the Antique Gas and Steam Engine Museum in Vista, California, United States. Door-code 'C' was returned to the UK, and is currently displayed in the Science Museum at Wroughton, and is currently only viewable via appointment at this location. The fate of the fourth Tucker Sno-Cat door-code 'D' is unknown, and may still be in the vicinity of Shackleton Base. An image of Tucker Sno-Cat door-code 'B' spanning a crevasse is included in the Voyager Golden Record as image #108. See also M7 Snow Tractor Arctic Cat Bombardier Inc. Bulldozer Hagglunds Snow coach References External links Sno-Cat corporate and history site. British TV Show "Salvage Squad" Restoration of an Aktiv Snow Trac ST Classic Sno-Cat History Page of a Tucker Collector Tucker Sno-Cat restoration project page Emit Tucker Patent patent list Companies based in Medford, Oregon Snowmobiles Tracked vehicles Trucks