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.
Babies who begin to learn to swim between the ages of 6 months-18 months old will take around one to two years to learn to be safe in the water. Children who start swimming lessons between the ages of 18 months-3 years old will take about one year to learn to be safe in the water. Children older than 3 years old with no previous swimming experience will take about 6 months to one year to learn to be safe in the water. With group lessons, the process of learning to swim is slower. The sooner your child begins to learn to swim, the sooner your child will be safe in the water.