Navy Experimental Diving Unit

• Oldest U.S. Navy Diving Unit: The Navy Experimental Diving Unit (NEDU) was established in 1927, making it the oldest official U.S. Navy diving research organization. • Birthplace of Mixed-Gas Diving: NEDU pioneered the use of helium-oxygen (heliox) breathing mixtures, which enabled divers to work at greater depths by reducing nitrogen narcosis and oxygen toxicity. • Home of the Navy Dive Tables: NEDU developed and refined the U.S. Navy Diving Tables, which set global standards for safe decompression procedures. • First Deep-Sea Diving Helmet Test: In 1930, NEDU tested the Mark V diving helmet, which became the iconic gear for Navy divers and was used for over 50 years. • Saturation Diving Pioneers: NEDU was instrumental in developing saturation diving techniques, allowing divers to live and work under pressure for extended periods. • World Record Depths: In 1968, NEDU set a then-world record by sending divers to a simulated depth of 1,000 feet of seawater in a hyperbaric chamber. • Undersea Rescue Research: NEDU played a key role in testing and improving submarine rescue and escape systems, including the development of the Submarine Escape Immersion Equipment (SEIE) suit. • Testing Experimental Technologies: NEDU has evaluated and certified new diving equipment for the Navy, including rebreathers, dry suits, underwater tools, and even remotely operated vehicles (ROVs). • Medical Breakthroughs: NEDU's research into decompression sickness and oxygen toxicity has directly contributed to advances in hyperbaric medicine, benefiting both military and civilian divers. • Located in Panama City, Florida: Since 1975, NEDU has been based at the Naval Support Activity Panama City, where it operates advanced hyperbaric and environmental test facilities.