• 30m, 3 atm = Splash resistant. Ok for rain, handwashing, other occasional contact with water. 50m, 5 atm =Suitable for swimming, fishing, other outdoor activities. 100m, 10atm = Suitable for snorkeling and other prolonged contactwith water, but not for scuba.

  • The back of the watch states the watch is3ATM Water Resistant. This does not mean the watch iswaterproof. 3ATM Water Resistant is often misinterpreted aswaterproof to 3 meters or 30 meters. 3ATM (30 meters= ~100ft.): This is the initial level of protection/waterresistance.

    Furthermore, what does 20 atm mean on a watch? 20 ATM refers to the watch being able towithstand the pressure of 20 Atmospheres or20-times the normal air pressure at sea level. So to resist20ATM your watch is rated to be water resistant to adepth of 200 meters (20x10m). Note that this does notmean you should go deep-sea diving with yourwatch!

    Also Know, what does ATM stand for on a watch?

    In this context ATM is short for atmospheres,where 1 atmosphere is the normal pressure at sea level. Itis a rating for water resistance. So 10 atmospheres meansthe watch can withstand 10 times the pressure at sea levelwithout allowing water in.

    What does 5 ATM stand for on a watch?

    Water resistant to 5 ATM means it can withstandwater pressure up to 5 atmospheres (approx. 75 psi). Ibelieve this pressure translates to the depth of 40meters.

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