Question for Diver owners

[simongpaez]

A basic one here but I just got my Diver yesterday so I don't know :)

How thight should the crown (both) be to avoid water damage? I don't want to mess up the rubber on the crown by over doing it but at the same time I want to avoid water damage, does it has Rolex type mechanism ( sub and others ) that water won't get in even unscrued?

The truth is I don't plan using it for diving but I want to make sure if I use it in the pool or other lite water activities I am ok.


Thanks
Simon