Please find below a link to an Economist article and also some info about that article in a pdf.  It is possible that the link may stop working after 5 days.

You’ve been given free access to this story from The Economist as a gift. You can open the link five times within seven days. After that it will expire.

Alternatives to GPS are around the corner
https://economist.com/science-and-technology/2026/09/27/alternatives-to-gps-are-around-the-corner?giftId=YTY0NTdjN2YtMTkxZi00YjNjLWE3MTQtYmYxZDRiMGU4NDJl&utm_campaign=gifted_article

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