I recently served as the timekeeper for schoolchildren touring a museum. I had to ring a bell to signal when it was time for each group to shift to their next area in the museum, where a volunteer would explain their particular exhibits. I also had to inform each volunteer in each of five areas when they had two minutes until I'd be ringing the bell. So, over periods of 50 minutes for each of the two tour groups, I was watching my DS 30 Ocean more closely than I ever have before. The...

Event Timekeeper