Dress your child in bright colors when going to the lake or the beach. Use a consistent color and style of swim suit so all family members know what the child is wearing.
Carry a picture of your child in the consistent outfit to show a lifeguard or others.
Have a hook, rope and throw ring attached to the dock so that they can be used at a moment's notice.
Have the child wear a life jacket in a boat or around the water when there is the potential for an accidental submersion. But, life jackets are not a substitute for the ability to swim or for adult supervision.
Flotation devices can provide a false sense of security for parents and children. These items can easily deflate or fall off your child's arm.