Water resistance explained
Water resistance is measured in metres or ATM's. One ATM is equivalent to 10 metres. If, for arguments sake, your watch
is marked as water resistant to 100 metres (10 ATMS) then it is suitable for surface swimming, not diving/scuba diving.
We do not recommend wearing a watch rated less than 100 metres (10 ATMS) when
swimming.
The 100 metres refers to the water depth the watch can withstand under laboratory conditions, not real life. This is true
of ANY watch, not only those sold by us.
Below is a guide to the normal kind of usage that water resistance ratings will allow:
- Water resistant to 3 ATM (approx. 30meters/98feet) = Splashproof only
- Water resistant to 5 ATM (approx. 50meters/164feet) = Shallow water swimming
- Water resistant to 10 ATM (approx. 100meters/330feet) = Swimming/Snorkeling
- Water resistant to 20 ATM (approx. 200meters/660feet) = Skin Diving
If you intend to go Scuba diving then a specialst watch designed for this is strongly advised. Water resistant watches should be inspected every year by a qualified jeweller and any worn out seals replaced. The
water seals should also be checked whenever the watch is opened - for instance when having a new battery fitted.
Water resistance should never be confused with "water proof".
Can I wear my watch in the bath/shower/sauna etc?
No - hot water can have a damaging effect on the seals used in your watch that provide its' water resistance.