I would like to see some redundancy in navigational equipment before this becomes a reality. Currently ships only have traditional navigation methods to fall ba

I would like to see some redundancy in navigational equipment before this becomes a reality. Currently ships only have traditional navigation methods to fall back on if satellite navigation fails. While there are some projects underway to find a seamless replacement for GNSS [1], none are quite there yet. [1] http://www.e-navigation.net/index.php?page=resilient-pnt-from-pnt-unit-concept-to-first-realization http://www.e-navigation.net/index.php?page=resilient-pnt-fro...