I took the family to the pool last week and watched a young girl, that did not know how to swim, have free run of the place. She was wearing a NON Coast Guard approved personal flotation device (PFD). Her dad had to save her more than once and there was no attempt by the lifeguards to redirect her to a safer vest. The dad was not a great swimmer either and had a hard time keeping his daughter from hurting herself.
I was stunned at the lack of response by the aquatics staff. If a family is choosing to use flotation devices for their children, lifeguards should never let children, who cannot swim, wear anything other than a Coast Guard approved PFD.
A good resource on how to select a PFD can be found here:
https://www.uscg.mil/hq/cg5/cg5214/pfdselection.asp