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.
The beginnerâs swim test consists of swimming one length of the lap pool (25 meters), followed by one minute of treading water. The beginnerâs test must be administered by a life guard. See the manager on duty to schedule a test.