And because I don't think posters have read the links I do think the guidelines that I linked were pertinent so I have copy and pasted some content:
Childhood is the best time to prepare children for safe aquatic participation and provide the skills and knowledge needed to have a lifelong safe association with water. The strategies used to prevent child drowning and prepare them for participation in aquatic activities change as they grow, but it remains essential that foundation skills and drills are developed at a young age.
0-4 years
Parents ? use close, constant and focused supervision.
Parents ? Learn Resuscitation.
Ensure the pool is fenced with a working self closing and latching gate. Provide a safe play area, particularly if living on a farm or large property.
Water familiarisation and confidence - preparatory skills.
5-9 years
Parents ? Increasing distance, but always within eyesight and ready for action.
Parent ? Lifesaving and rescue skills Child ? Personal survival skills; treading water and floating
Set rules and behaviour in, on and around water and reinforce them often.
Learn to swim and water safety ? basic foundation skills. Participate in Swim and Survive.
The location where children drown changes as they grow, from ?Swimming Pools? in the under 5 age group to ?River / Creek / Stream? locations for older children. Also as children age the activities they are undertaking immediately prior to drowning changes, from children who are playing and gain unintended access to water and fall in to being in or on the water (i.e. interacting with water) prior to drowning.
10-14 years
Increasing independence but need to physically check up on them regularly.
Parent ? Lifesaving and rescue skills
Child ? Personal survival and basic rescue skills; reach to rescue and rope throw.
Setting rules and boundaries, guiding the selection of appropriate locations and activity.
Swim and Survive ? essential water safety swimming and foundation skills.
15-17 years
swim with friends and ensure the safety of yourself and those with you.
Child ? Personal survival, lifesaving rescue and emergency skills; Bronze Medallion and resuscitation training.
Setting rules and boundaries, proving skills for selecting appropriate locations.
Lifesaving, swimming and water safety ? skills for aquatic activities.