"Jürgen Exner" wrote:

You cannot solely rely on a single navigation aid system, in particular if
it is controlled by the military.
Therefore there will always be some form of terrestial navigation aid as a
backup system.

jue

You might look to see how many countries have approved IFR navigation
using GPS. The use of "military controlled" is one of those
xenophobic phrases used to justify Galileo. I use GPS frequently and
I have ZERO concerns about the people who operate the system.

Ron Lee
American and proud of it