I do not go in water with anything rated under 20 ATMs (200 meter/660ft ) professional grade divers keep in mind the test is done in a static environment. Yes the pool may be only 9 ft deep but pressure when you dive or swiming or the ocean get hit with wave bam right on the watch side . I must have at least 10 Gens rated 200 or above so why take chances. My policy is reps do not go in the water period, pool, ocean or shower (nor should any watch should go in there ) but that is just me.