What is a "wet check" in terms of lifeguarding?

Question

What is a "wet check" in terms of lifeguarding?

Answer 1

I was a life guard for 2 years. They never taught me that term

Answer 2

I was a life guard for 5 years and I never heard of a wet check

Answer 3

Checking for items in the pool that shouldn't be there -- like rocks, bottles, anything that can hurt someone.