New technology for navigating without GPS

A new method for navigation at sea, independent of GPS, is being put forward in a dissertation from Linkoping University.
Today merchant marine, military, and recreational boat traffic all rely on the global satellite system GPS to determine their position at sea. But sometimes information from the system is incorrect. Poor visibility or lax attention can then spell disaster.

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<p><a href="http://www.physorg.com/news3375.html">New technology for navigating without GPS</a></p> <p>A new method for navigation at sea, independent of GPS, is being put forward in a dissertation from Linkoping University. <br>Today merchant marine, military, and recreational boat traffic all rely on the global satellite system GPS to determine their position at sea. But sometimes information from the system is incorrect. Poor visibility or lax attention can then spell disaster.</p>