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本帖最後由 Cello093 於 14-4-30 17:20 編輯
FattyDaddy 發表於 14-4-30 01:20
By the way, magnetic North is not true geographic North, they are a few hundred miles apart, and it keeps changing because the Earth wobbles as it spins.
Neither of the questions stated that magnetic compass was used in finding the directions. In these modern days, GPS or satellite navigation is the norm.
The group of scientists will surely not be ignorant as to use magnetic compass there.
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