Lately i've heard the tragic stories of two cruise ship passengers lost at sea when they fell overboard.

I was wondering why cruise ship passengers and crew are not outfitted with RFID bracelets so they could be located more quickly should they fall overboard.

Am i missing something?...Or has no one thought of this simple solution to a really scary and difficult problem?
____________

It would have to be something more powerful than an RFID, which only works in close proximity to a reader. It would need to be more along the lines of a portable GPS unit - Not too large, but perhaps annoying enough to passengers if they're literally required to keep it strapped to their person when out on deck. Better monitoring of the deck areas would be more effective and less invasive. Fortunately, it seems passengers falling overboard is relatively rare.
____________