Water Resistance In Watches — Why "30m" Doesn’t Always Mean The Same Thing
Water resistance ratings in watches, such as "30m," often lead to confusion due to their varying interpretations across brands. While "30m" suggests a watch can withstand pressure equivalent to 30 meters underwater, this is based on controlled laboratory conditions without accounting for real-life factors like movement and temperature changes. Consequently, some brands recommend that a "30m" rated watch is suitable only for handwashing or splashes, while others may assert it's fine for swimming. The inconsistency arises from different testing methods, the presence of safety margins, and each brand's communication strategy regarding water resistance. Some manufacturers, like IWC Schaffhausen, provide clearer guidelines by listing water resistance in bars and explicitly stating that these ratings do not equate to actual dive depths. This approach helps consumers understand what to expect from their watches. In contrast, other brands may apply conservative testing and ratings, leading to a varied understanding of what "30m" truly means. Ultimately, consumers are advised to consider these nuances and seek guidance from manufacturers about water resistance capabilities, especially if they plan to engage in activities like swimming or diving.
