The timekeeper's twenty-minute count-down clock is not displayed at a football game.
Unless a video backup system is used, it may be necessary to use the full complement of timekeepers even when automatic officiating equipment is used.
They also receive and use time signals from the satellites, which make them essentially perfectly accurate timekeepers, even over long periods of time.
The finished project provided excellent player (and umpire) facilities, as well as under cover viewing and seating for supporters, timekeepers and catering volunteers.
Pendulum clocks were more than simply utilitarian timekeepers; they were status symbols that expressed the wealth and culture of their owners.
Additional timekeepers can be used to track penalty times in highly contested matches.
Although they were successful commercially, torsion clocks remained poor timekeepers.
In higher level matches sometimes there are even more than two timekeepers used.
