Hamilton Khaki Navy Belowzero Automatic Diver's Titanium H78505330 1000M Men's Watch A watch built for deep, saturation-diving professionals going beyond the normal depth ranges, the BelowZero is built to go down till 3,000 feet and a little more, if need be. That’s around 1/8th down the Mariana Trench or 12.5% of its total depth of 36 thousand plus feet or over 11,000m. The Khaki BeLOWZERO is perfect for those daring deep-sea enthusiasts.