If I understand your contention, a diver would have to have a flotation device, according to usual protocol. Can you please find a way to show us what you're talking about? Is this guy wearing what you're referencing?
![](http://farm8.staticflickr.com/7169/6600866747_6592fec8c5_z.jpg)
That's just an example I found on the Web. What equipment is the "person" in the Fuddy video missing? In your opinion.