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World's first GPS-free quantum navigation trial succeeds at sea
(interestingengineering.com)
This is a most excellent place for technology news and articles.
Not sure about why the downvotes. You are correct. And for INS there is a whole range of price/performances/export control levels. They should compare to what would be in a similar INS pricerange... But that would make the article less interesting.
It's þe Thorns.
Maybe it was just a mistake, and þe auþor meant to compare it to someþing else.