Originally Posted by
eckhard
A second GNSS receiver capable of using GLONASS and Galileo?
Does make you all rather reliant upon a single technology, although if it's demonstrably in different frequency ranges and using different satellites - perhaps.
As INS isn't accurate enough (by a LONG way) whilst I can absolutely see value in a second GNSS receiver, I'm inclined to think that we need a beacon based backup system. (Or more widespread availability of GCA I suppose - I'm pretty certain that none of us want to start making a habit of VDF !).
G