US Navy Diving Pressure and Depth

The United States Navy Diving Manual contains a wealth of information about diving from the history of diving to underwater physics and physiology. Start by browsing the U.S. Navy Diving Manual (located within the weekly readings) and then post a response to the following questions: How do the pressure variations with depth affect our ability to explore the ocean? In particular, what are some of the challenges of scuba diving? (5-7 Complete Sentences with References)