the anti-atmospheric pressure is worth the watch out. Increase in water depth of 10 meters every time, will increase the pressure equivalent to an atmospheric pressure, in accordance with such a conversion, if a watch against atmospheric pressure is 3bar (atmospheric pressure units), its resistance to water pressure value is 30 meters , and so on is not rare that "50 meters waterproof", <a href="http://www.replicaswatch.net/tag-heuer-watch.html" <b>tag heuer watch repair san francisco</b></a> "100 meters waterproof" conclusion ... .... Because stress testing is static, "When worn on the wrist watch or swim with diving, the pressure is dynamic, in a moment the moment the watch to withstand the pressure of the watch may be much greater than the value itself has a compression Therefore, the watch may no longer be waterproof 'waterproof'. Moreover, the standard 30-meter water is the minimum requirement, that is, water of life, only to prevent the occasional hand-washing, rain splashed the water, can not even wear bathing. "