I just bought a IWC Aquatimer and the water resistance is 120m.
I saw an article (from another branded watch maker) saying that:
Depth in meters and limitations
Water-resistant 30 m = do not swim or dive.
Water-resistant 50 m = bathing, showering, swimming possible.
Water-resistant 100 m = swimming and snorkeling possible.
Water-resistant 200 m = swimming, snorkeling, diving possible.
Is this true? Same apply to IWC Aquatimer?
That is not true for IWC watches
Based on info from IWC it is my understanding it should be safe to dive with a 120m water resistant IWC watch. Consequently, the rule-of-thumb you mention does not hold true for IWC watches. The rule of thumb is used to compensate for pressures related to hand movements etc underwater and other things not tested for many watches.
Your Aquatimer should be safe. However, check the warranty or ask your AD what happens in case of a leakage. Just ot be sure....
You should also make sure the watch is reguraly checked for water resistance if you would like to use it for diving.
Regards, Peter
p.s. To my knowledge you can even use the chrono underwater (..but check before you do this)
That is not true for IWC watches
Thanks Peter.
That is not true for IWC watches
The additional pressure associated with arm movements through the water is negligent.