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Tara, advanced sentinel of the Arctic

François Bernard - Tara Expeditions Foundation2006-09

Tara Expeditions Foundation

Tara Expeditions Foundation

Early explorers calculated their position using the sextant and chronometer. They also had to fix an artificial horizon (at the time, a plate filled with mercury) because Arctic sea ice is never flat. The horizon is blocked by numerous compression ridges caused by overlapping plates of ice which collide in the drifting action.
Tara Arctic expedition 2006-2008

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