Patek Philippe

You are a brave soul 👍

Now, the watch industry says a watch with 30 M water resistance should survive swimming at 30M.  Now...  Scuba divers have multiple ratings, but the PADI system, most divers are "Open Water Diver Certification" which allow them 18M and a higher rating is "Advanced Open Water Diver Certification" which allows 30M.  

Now...  I a Patek Philippe Calatrava or even a Nautilus sold today - are both rated at 30M water resistance - meaning they both should be sufficient for a short dive by an Advanced Open Water certified diver.  

Sure, shallow water, in a swimming pool is one thing.  Swimming pools don't get much deeper than 3-4 meters.  

Here is the text from the Patek Philippe press release (09-APR-2024):

Unified criteria for water-resistance

To ensure the homogeneity and clarity of the information provided to clients, Patek Philippe has decided

to introduce a new unified standard of water-resistance set at 30 meters for all watches certified as water-

resistant –having been tested in air and underwater by immersion at an overpressure of 3 bars

(corresponding to a depth of 30 m). This measure makes it possible to guarantee the same performance

level across all the models concerned and to provide perfectly comprehensible information as to the day-

to-day activities in which clients can engage while wearing their watch: washing their hands, showering,

bathing, swimming and other aquatic activities, including diving to a depth of 30 m – which corresponds

in large measure to actual utilization.

ISO new standard:

www.iso.org

ISO 22810 (new) replacing ISO 2281 (old)