I used it underwater (salt) to depths of 60 feet. No leaks, and decent photos. One really odd thing I can't figure out....in underwater mode, though it corrects the color ok, the iso is only 'set' to iso 125 or so. As anyone knows...even with bright lights..

The Nikon COOLPIX W300 is a waterproof rugged compact, so let's start with its rugged credentials. It's the most waterproof compact currently on the market, with a depth rating of 30 meters – that's twice as deep as the Olympus TOUGH TG-5 and 10 metres deeper then the Fujifilm FinePix XP120.