I have a question about the GPS speedometers.

What prevents them from losing the signal? When using GPS on my phone, I sometimes experience a signal loss and the map and directions freeze up.

Does this happen with the speedos? What guarantee is there that the GPS transmission to the speedometer will continue in the future?

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)