Re: Time synch
As you say, this report seems overly concerned with how some very rich banks will cope should GPS disappear and the poor dears hence be unable to time their trades. My suggestion: they should buy a clock.
Failing that they may want to avail themselves of this thing called NTP (network time protocol) available for free on the 'net.
Other assorted freeloaders need to buy maps and learn how to use them. Any ocean going mariners carry sextant, clock and tables. Planes can get around without GPS too.