That is correct. That said, the main thing keeping them from being water resistant are their gaskets, which are generally really cheap. I have seen someone simply replace the caseback and crown gaskets (on a Grenade model), and the thing pressure tested easily to 200m. After replacing the gaskets, he took it diving several times with no problems. That said this one of the few Alpha models that use miyota movements, which are very good solid quality. I can't really speak for the overall long term movement quality of other movements used by Alpha, nor do I think I would trust my life to a watch that wasn't specifically designed for diving. The gasket swap will easily make the watch a reliable swimming companion though.I thought Alpha's were nominally water resistant, i.e. 30m, rather than diving depths?