CURVILINEAR
A hockey puck is launched from London toward the
west, on a stationary earth. The natural great circle motion
of the puck takes it toward the equator, not along the
original line of latitude, which we might normally call
west. The great circle path also coincides with the line of
sight toward the west (projected radially down to the
earth'surface). Thus we must conclude that Costa Rica is due
west of London.
Legend:
Blue: Inertial Great Circle
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