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Group: Kentucky, Commonwealth of (U.S.A.)
People: García Íñiguez
Topic: Thai War of 1660-62
Location: Ngirsu Dhi Qar Iraq

In crossing the Atlantic in 1498, Columbus …

Years: 1498 - 1498
August

In crossing the Atlantic in 1498, Columbus discovers that the angle between North as indicated by a magnetic compass and North as measured by the position of the pole star changes with his position (a phenomenon now known as "compass variation").

He will later use his previous measurements of the compass variation to adjust his reckoning.