Water resistance of the watches
Water resistance is the feature of the watch, thanks to which the watch case does not let the moisture or water in.
The water resistance is divided into several groups depending on what intensity of the water pressure the watch is able to resist. For example, the 30M or 30 meters mark corresponds to the pressure of 3 atmospheres, sometimes marked as 3 ATM. Unfortunately, this does not mean that you can dive with such watch to the depth of 30 meters. By moving the hand underwater, the water pressure on the watch increases considerably therefore water resistance 30M/3ATM resists rain, hand washing and other forms of splashing water. You cannot swim with them.
The part of the watch through which the water gets in is usually the crown (that is the part that you turn to set the time). Therefore, under no circumstances do not touch or crouch it underwater.
Below we described the different degrees of water resistance.