Lifeguards are useful only if they are alerted when someone is drowning (Lifeguards would have made a difference; July 10).
One cannot expect a lifeguard to continuously scan a swimming pool for hours.
It is more important to have a way to trigger an alarm when someone is drowning.
Perhaps sensors or robotic eyes could be developed for this purpose.
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If there is an alarm, then other people present can also help when it is triggered.
Clearly, the statistics from the news report show that having a lifeguard may not make a critical difference.
Tan Peng Boon