Do you mean a "dive computer" watch, or a watch that can go deep underwater?

I think better to buy dive computer directly..

At first also i was thinking to buy dive watches.. So I bought it but I never use it when diving as it's not practical..

and dive comp is really important (from my point of view) especially if you want to do deep dive and multiple dives per day. So i bought the simplest dive comp which is zoop