Dive watches
Dive watches come in a two forms, the ones which look nice and can actually withstand a little pressure but never get to discover the depths of the ocean, just the splash of a shower or the occasional washing up, but still look nice, and the ones that actually does what it says on the box.
Characteristically a dive watch will have the resistance of up to 300m in lines with ISO 6425 Regulations, it can give different functions to aid with a dive. They come in a digital or analogue form and even combined.
The stop watch facility on dive watches is used for gauging the depth time. Dive watches are often used in conjunction with dive computers.