The HD HERO Original, HD HERO2, and HERO3 cameras come in a protective waterproof case that is capable of withstanding depths of up to 197 feet (60 meters). Before taking the unit in the water you'll want to be sure to verify that there is no dirt or debris along the white rubber gasket that could compromise the integrity of the waterproof case.

To ensure that the camera is fully sealed, push the housing backdoor all the way in before securing the black latch on the top of the case. 

If you are using the camera in salt water, it's always a good idea to safely remove the camera and wash the housing with fresh water.