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Updated: June 13, 2025
He would start from the opposite side and get the help of the current. Others had feared and avoided the pack-ice. He would make for it and allow himself to be caught in it. Others had sailed in unsuitable vessels which had been crushed like nut-shells among the floes. He would build a vessel with sides sloping inwards which would afford no hold to the ice.
The ice-floes are quite steady in really thick pack-ice, and the theodolite can be set up and levelled as well as on dry land. The observations, both for latitude and longitude, consist in measuring altitude of the sun or of a star. The chief uncertainty in this measurement is that introduced by the refraction of light by the air.
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