Just like we are now - safe, protected, still on the surface as far as our bodies' concerned.

In this segment, Brooks (or at least his narrator) interviews a diver, who explains here how his diving suit works. Again, though, we have the wrong spelling for a word that sounds the same. It should be "our body's concerned." Even more preferable would be "our bodies are concerned," wince we don't all have a common body, but that would put words into the diver's mouth.

Source: World War Z, p. 300