current L3Harris division known as Link Training and Simulation, now headquartered in Arlington, Texas (though it still maintains some operations in Binghamton). The Link Foundation In 1953, Edwin and Marion Link established The Link Foundation. The foundation continues to provide grants and fellowships in aeronautics, simulation and training, ocean engineering, energy, and organizations of interest to the Links. Undersea interests Man-in-Sea project After Link sold his company to General Precision in 1954, he turned his attention to underwater archaeology and research. Link worked at developing equipment for deeper, longer lasting and more secure diving. To this end he designed several submersible decompression chambers. On August 28, 1962, at Villefranche-sur-Mer on the Mediterranean Sea, Link inaugurated his "Man in Sea" project by spending eight hours at a depth of in his submersible decompression chamber (SDC), becoming the first diver to be completely saturated with a mixture of oxygen and helium (heliox) while breathing underwater. This dive served as a test run for a dive the following month by Robert Sténuit, who spent over 24 hours in the SDC at a depth of and thus became the world's first aquanaut. In June–July 1964, Link conducted his second Man in Sea experiment in the Berry Islands (a chain in the Bahamas) with Sténuit and Jon Lindbergh, one of the sons of Charles Lindbergh. Sténuit and Lindbergh stayed in Link's SPID habitat (Submersible, Portable, Inflatable Dwelling) for 49 hours underwater at a depth of , breathing a helium-oxygen mixture. Dr. Joseph B. MacInnis participated in this dive as a life support specialist. Submersibles In March 1967, Link launched Deep Diver, the first small submersible designed for lockout diving, allowing divers to leave and enter the craft while underwater. Deep Diver carried out many scientific missions in 1967 and 1968, including a lockout dive in 1967 (at the same location as the 1964 Sténuit-Lindbergh dive) and a lockout dive near Great Stirrup Cay in 1968. Dr. MacInnis participated in both of these dives as an observer in Deep Diver'''s forward chamber. Later in 1968, after Deep Diver had been requisitioned by the United States Navy to help search for the lost submarine USS Scorpion, the Bureau of Ships determined that Deep Diver was unsafe for use at great depths or in extremely cold temperatures because of the substitution of the wrong kind of steel, which became brittle in cold water, in some parts of the