'We're Sliding on the Edge of the Sea Floor Here'

CNN's Martin Savidge shows us the inside of a submarine as the search for MH370 continues under water.  

"I would say the front seat of my Ford Focus would have a little more room for all of us," Savidge jokes as he describes the conditions inside the vessel with a crew of four.

Here are some behind-the-scenes photos from his Instagram account:

Savidge writes: "Out of the cockpit and into the sub starting on "New Day."

Here he shares: "Getting ready for test run."