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J**L
Great-Circle Route Map Notebook
Notebook is big enough to stuff in an oversized pocket, like on a backpack, the size of a trade paperback slightly bigger than a pocket paperback in terms of dimensions. Note that the "flat earth" map is also the "great circle" map projection which was common among pilots pre-computer age in the northern hemisphere as it was used to determine the shortest great-circle route flight paths between two points. This great-circle route map can be found in most world atlases printed pre-1980's.