The Hydroview can be controlled by iPhone or any other tablet with a gyroscope. So by simply tilting the equipment in the right directions, the submarine will take you where you want it.
The connection with the gadget is via Wifi and seems to hold up to 75 feet or about 22 meters (hope it goes up in case of loss of signal).
For those who would like to acquire it and make some videos this summer, know that this nice gadget will cost you the modest sum of $ 2995.