Waterproof

Waterproof

Watches are classified by their degree of water resistance, which roughly translates to the following (1 meter = 3.281 feet):

Water resistance rating Suitability Remarks Water Resistant 30 m or 50 m Suitable for water related work and fishing. NOT suitable for swimming or diving. Water Resistant 100 m Suitable for recreational surfing, swimming, snorkeling, sailing and water sports. NOT suitable for diving. Water Resistant 200 m Suitable for professional marine activity and serious surface water sports. NOT suitable for diving. Diver's 100 m Minimum ISO standard (ISO 6425) for scuba diving at depths NOT requiring helium gas. Diver's 100 m and 150 m watches are generally old(er) watches. Diver's 200 m or 300 m Suitable for scuba diving at depths NOT requiring helium gas. Typical ratings for contemporary diver's watches. Diver's 300+ m helium safe Suitable for saturation diving (helium enriched environment). Watches designed for helium mixed-gas diving will have additional markings to point this out.