You are trusting your life to this low-redundancy system working. Think about that. A failure can kill you and your passengers, or cause debilitating injury. T

You are trusting your life to this low-redundancy system working. Think about that. A failure can kill you and your passengers, or cause debilitating injury. The GPS satellites themselves are a single point of failure. E.g. in northern Norway, GPS becomes unreliable or unusable whenever the Russians decide to jam it for an "exercise". Then it's whatever software you're using. Does your GPS software give you coordinates if there's some internet outage that kills your maps? Do you have backup paper maps to use those coordinates for? Do you have a compass to determine which way you're going between readings? I'll often use nothing but a GPS receiver with a map for navigating when flying or sailing. They're pretty reliable. But you bet your ass I'm not trusting my life to that single system, and will know where I am at all times and have a compass and paper map as backup in case they failed.