Tim Watts used his keyboard to write :
And if you install a proper NTP client, it will try to maintain a drift
correction factor between NTP time and the local (kernel software) clock
which improves accuracy between NTP remote queries.

I used to use one back in the 1980's, but a sync every thirty seconds
is more than enough.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk