NEWS YOU PROBABLY CAN’T USE: Polynesian Wayfinding: How these sailors navigated the open Pacific with no compass or GPS. “Piailug was born in 1932 and became a master navigator, or palu, by the time he was 18. He practiced the art of wayfinding for nearly 60 years until shortly before his death in 2010. Having become concerned that the old knowledge would be lost, Pialiug worked with the Polynesian Voyaging Society to recreate lost techniques, passing on his wisdom to sailors like Thompson.”

Vikings navigated to America in similar fashion, though I haven’t heard that anyone is practicing their methods now.