Timekeeping (Australian rules football)
Timekeeping in Australian rules football is the duty of timekeepers, who are employed or appointed to keep track of the duration of the match from a location off the field, to account for the duration of stoppages (known as time on and time off), and to signal the end of each quarter by blowing a siren. Timekeepers, whether independent or club-appointed, are used at all levels of Australian rules football.