[Drowning] is the number two cause of accidental death in children, age 15 and under (just behind vehicle accidents) –- of the approximately 750 children who will drown next year, about 375 of them will do so within 25 yards of a parent or other adult. In ten percent of those drownings, the adult will actually watch them do it, having no idea it is happening.

Mario Vittone

Well worth a read. At a recent pool party I was keeping an eye on the kids in the pool, but I wonder if I would have actually spotted a drowning incident in time.