The world record for the deepest SCUBA dive lies at 1,089 ft (332 meters). The Deepsea can go much deeper - up to 12,800 feet (3,900 meters). That might not be enough to go all the way down the Mariana Trench, but it's more then enough for professional Helium-Deep-Divers. Similar to the Submariner, this watch offers an elegant, easy-to-read dial and a bezel which allows you to keep track of your time underwater. The Deepsea also has a special valve to let out Helium during the decompression process when divers are resurfacing. Honestly, although you could use it for diving to the bottom of the ocean, in most cases nowadays you probably take your high tech dive-computer with you while wearing your Rolex mostly above sea level.