I have a Nikon ActionTouch (no longer made) but it's only good to 10 or 15ft, which from my reading the majority of these style P&S's are. To be safe at 30ft you need a more specific camera built for the task, like Sea & Sea, or a Nikonos (I think I've seen another brand advertised but can't think of it). The other alternative is a housing or waterproof bag, but they don't really fit in with how your intending to use it. We love our ActionTouch and use it for the purposes you cite, beach, pool, snow, etc. Up until recently and they may still do, Canon made a waterproof P&S... the model escapes me but it was white and red. Someone (maybe Ricoh or Samsung) makes a digi version.