These divers watches have been designed for underwater diving, all featuring a water resistancy rating greater than 100m (300 ft) as a minimum. The typical diver's watch will have a water resistancy rating of 200-300m but modern technology allows for the manufacture of divers watches that can go much deeper - the luxurious Delma divers watches in particular can go up to 3000m! Divers watches should be ISO compliant and suitable for diving with underwater breathing apparatus, and will be marked as such to distinguish them from watches that might not be suitable for deeper depths.