Hell its even accurate to the same big digital clocks I saw on the tarmac at Heathrow and New York airports.
Their minute would tick over inside the same second that mine would.
wikipedia wrote:Today, the GPS global positioning systems in coordination with the NTP network time protocol can be used to synchronize timekeeping systems across the globe.
Now we have a GPS receiver in our data center which acts as Stratum 1 NTP server. From there our Windows Active Directory Domain Controllers act as Stratum 2 NTP servers (I know I know, computers are ugly clocks). My laptop is then syncronised off the DC's, and my watch syncronises off my laptop on data download.
It's about as 'accurate' as its going to get for a watch. Perhaps I should say its about as "syncronised" as possible for a watch.