All aboard the Flat Earth cruise - just don't tell them about nautical navigation [View all]
A group of people who believe the Earth is flat have announced their “biggest, boldest, best adventure yet”: a Flat Earth cruise scheduled for 2020.
The cruise, organized by the Flat Earth International Conference, promises to be a lovely time. Flat earthers – who include the rapper B.o.B. and reality television person Tila Tequila – will be able to enjoy restaurants, swimming pools and perhaps even an artificial surf wave.
There’s just one problem for those seeking to celebrate the flatness of the Earth. The navigational systems cruise ships, and other vessels, use rely on the fact that the Earth is not flat: theoretically puncturing the beliefs of the flat Earth crowd.
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The FEIC did not respond to requests for more information on the Flat Earth cruise. The organization could potentially try to staff the cruise ship with a crew which does not think the Earth is round, but Keijer said that would be difficult.
https://www.theguardian.com/science/2019/jan/09/flat-earth-cruise-nautical-navigation
It's not just GPS, of course; navigators have been using latitude, and observations of the sun and stars, to calculate their position based on a globe, for centuries.