To Ed Link, the launching under a bright Florida sun in January 1971 of the Johnson-Sea-Link was the culmination of a dream begun almost two decades before. With financial partner, Seward Johnson, Link received the accolades of distinguished scientists as the 9-ton, 23-foot, diver-carrying submarine officially went into the water for the first time. Here, at last, was a self-contained submersible with better visibility, lower cost, lower maintenance, and increased safety that would be used strictly for marine research. Its 66-inch acrylic sphere gave the craft an almost helicopter-like appearance and from that sphere man was in a better position than ever to explore the unknown recesses of the sea. By commissioning the sub for the Smithsonian Institution to continue experimental research, Ed Link was one step closer to realization of his Man-in-Sea project in which his aim long had been to enable divers to live and work at depths up to a thousand feet for days, weeks, and even months. This is a story of vision and teamwork. In the decade of the 1960s cooperating participants included the United States Navy, the National Geographic Society, the Smithsonian Institution, and many manufactureres and researchers. Thus, one man's dream and determination have expanded the frontiers of the sea to benefit mankind and to instill the future with a vast potential for environmental research.