Water Resistance

Got this from the internet...

Watches are classified by their degree of water resistance, which roughly translates to the following (1 metre = 3.2808398950131 feet):

Water resistance rating Suitability Remarks
Water Resistant or 50 m Suitable for swimming, no 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.

That should be sufficient Duff!

Seems like everyone has this one covered !! I don't dive either, but it sounds like it all depends on having confidence that your dive watch will not fail you. If you want to be safe, it sounds like 1000m would be the choice ! However, 200m dive watches are common and could be good enough for not so deep scuba diving ! Good luck...and happy diving !