Images: Rescue in the pool

A pool-monitoring system in Wales on Aug. 28, 2005, spots a young girl sinking in the deep end. The Poseidon system, from Vision IQ, is designed to alert lifeguards in real time and give them the exact location of possible trouble.

Swimmers at the surface fail to notice the trouble below. And Vision IQ notes that it's "virtually impossible for lifeguards to see everything that is happening in the pool all of the time."

The Poseidon system responds within seconds, pinpointing the girl's location and paging the lifeguards.

The girl lies motionless in about 12 feet of water as the lifeguard descends to her position.

Lifeguard and girl head to the surface, where she was rescusitated; the elapsed time of the entire incident, Vision IQ said, was 62 seconds. The girl then was taken to a hospital, where she recovered.