How A Radio-Controlled Watch Works; What Is A Radio-Controlled Watch - Casio 5086 User Manual

How a Radio-controlled
Watch Works

What is a radio-controlled watch?

A radio-controlled watch is designed to receive a time calibration
signal that contains standard time data and adjust its current time
setting accordingly.
After the watch receives the Standard Time signal, it performs
internal calculations to determine the current time. Because of
this, there may be an error of up to one second in the displayed
time.
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