Quote:
Originally Posted by sailaway21
Loran C has become the official USCG back up plan for GPS. On the brink of shutting the system down, it is speculated that someone posited the idea that it might be nice to have an electronic navigation system to use during those periods of time when the DoD decided it necessary to shut the GPS system down. Consideration of those circumstances grew out of 9/11 and homeland security needs. |
Out of academic interest, as I’m not really worried about this, but here goes..
So they (USCG) must have made a risk assessment? Do you know what they gauge the probability of GPS being shutdown to?
That would be interesting to know, as the Galileo (European GPS) project’s business case is based on the premise that the military operators give no guarantees on uptime.
ESA - Navigation - The future - Galileo - Why Europe needs Galileo
A figure on probability indirectly gives us an idea on uptime (still not guaranteed though)
(Bringing a sextant and some tables still won’t hurt you).
