| Water resistance rating |
Suitability |
Remarks |
| Water Resistant or 30 m |
Suitable for everyday use. Splash/rain resistant. NOT suitable for swimming, snorkeling, water related work and fishing. |
NOT suitable for diving. |
| Water Resistant 50 m |
Suitable for swimming, white water rafting, non-snorkeling water related work, and fishing. |
NOT suitable for 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 suitable for saturation diving. |
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 suitable for saturation diving. |
Typical ratings for contemporary diver's watches. |
| Diver's 300+ m for mixed-gas diving |
Suitable for saturation diving (helium enriched environment). |
Watches designed for mixed-gas diving will have the DIVER’S WATCH L M FOR MIXED-GAS DIVING additional marking to point this out. |
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