No, you're nice and dry in a military sub. These scientists are living underwater in order to study the reef as efficiently as possible, which means they're out all day in wetsuits and thus need to deal with the havoc that being wet all day eventually wreaks on the body.

That said, I don't quite understand why they don't just wear drysuits then? They're a bit fiddlier to use, but pretty commonplace these days, and don't keep the entire body dry, but that still seem a lot better than keeping none of it.