Drowning (T2B16)

In this article, an eight year old drowned in a ship's swimming pool. Apparently, lifeguards were not assigned at the pool. Link.

First of all, why is there a swimming pool in a boat when it is already floating on water? Second of all, why are there no lifeguards?????! It shouldn't be a surprise that someone actually died. 

I wonder what people in the past would think of us now: people keep water in and out of a boat and it's not even a submarine.