The Deep Sub submersible is engineered to go to 36,000' of depth - 16,000 PSI or 1100 Atmospheres. The pressure hull is built of carbon fiber with a aluminum dome at the back end and a fused quartz dome at the front. 

The fused quartz is a manmade ingot that has taken over three years to machine from a 2800 lb ingot to a 550 lb hemisphere. The dome offers a unprecedented view - no one on the seafloor has ever had a view like this.

The rest of the sub is "flooded" - water is around the components. Important items are filled with oil but are still exposed to the full pressure. This includes the batteries, servos, and electric motors that are used for motion on the seafloor. Syntactic foam, a special buoyancy material, makes up the rest of the volume of the sub.

The sub's biggest strength is range. We expect over 20KM of potential range exploring the seafloor. Every manned sub that has gone below 22,000' has been limited to inspecting the immediate area. Imagine parachuting into an area as big as Alaska at night, and only seeing what your flashlight reveals around you. You would learn a lot, but there's so much more to find.

The sub's instruments include high def sonar, video, and chemical sensors. Together, they will allow scientists to paint a full picture of the deep environment based on an unprecedented amount of raw data.

The Pentarius Deep Sub Project