Pole track

Published: Monday 15 April 1996

The South Pole is given to changing its location every year, making the exact pinpointing ofits site, a difficult job. But, with the "advent of the Global Positioning System -the satellite based navigation system - the positioning of this southern- most point on the earth has been made easier (New Scientist, Vo1149, No 2016).

The true geographic pole has to be staked out each year as the overlying ice sheet moves at a speed of 10 m annually, carrying along with it, the markers. Earlier, the markers were placed 10 m apart uniformly every year to locate the site of the South Pole.

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