the victoria ship
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THE VICTORIA SHIP
Cdm
It is called a great circle and the plane that circle makes must pass through the geometric center of the globe. The largest circle that can be drawn round the Earth is the great circle round its middle, the "equator" this is because the spinning of the earth makes it 'fatter' round the middle.
latitude
66½ºN is the Arctic Circle; 66½ºS is the Antarctic Circle.