This means that the battery is discharged down to 10.5 volts over a 20 hour period while the total actual amp-hours that it supplies are measured. Sometimes ratings at the 6 hour rate and 100 hour rate are also given for comparison and for different applications.
Pool meets are usually no more than 4 hours, but beach meets last about 7 hours. It depends how many events are in the meet. And then if it is a really big meet (like a tournament kind of) it can last days. Hope that helps.
Times Conversion Calculator. Entry Time Conversions. Entry times to swim meets serve two basic purposes: 1) to determine eligibility for the meet and 2) to properly seed swimmers in their events. Usually, a swimmer will enter an event using his or her best or most recent time.