The Fremantle Historical Society has a daily duty.
On the seaward side of the Round House,on Point Arthur, is the Time Ball, used in Days of Yore (Back when Yore owned everything) to indicate 1pm for ships’ captains to set their chronometers.
The Time Ball is lowered to half mast with five minutes to go, then raised to the top with a minute to go.
Then, at 1pm, the cannon is fired!
I can remember, as a teenager, hearing the cannon which performed the same duty in Perth. That one was at the Old Observatory.