[QUOTE=Kraken;182319]Soon we have 3 systems to rely on, navstar, glonass and galileo. If all 3 systems are down at the same time, we have bigger problems then navigation.[/QUOTE]
Should have said GNSS. It’s a path thing. If you want to make your beer cooling system twice as robust buying a second refrigerator won’t double reliability because the likely failure path is the electrical power supply.
Don’t really know all that much about GNSS reliability, truth be told, seems fragile though.