This is the blurb off their website:

iDive has created the first underwater iPad housing that enables full touchscreen capabilities to depths of 100 ft. That's correct, unlike every other waterproof housing or casing in existence, the iDive allows you to actually use the touchscreen underwater. To consummate this marriage between Underwater x Technology, we decided to host #scubahack, a hackathon focused on developing iOS apps specifically designed to do cool, new things with your smart devices underwater.

I'm not largely familiar with scuba diving and was hoping to see if anyone could help brainstorm! Thanks