Know how to swim?

Do you need to know how to swim to scuba dive?

You need basic swimming skills and the ability to comfortably maintain yourself in the water. Your PADI Instructor will ask you to:

Swim 200 metres/yards (or 300 metres/yards wearing mask, fins and snorkel) without stopping. There is no time limit, and you may use any swimming strokes you want.
Float and tread water for 10 minutes, using any method(s) you want.