SEALAB

Preliminary research work was undertaken by George F. Bond, who named the project after the Book of Genesis, which prophesied humans would gain dominion over the oceans. Bond began investigations in 1957 to develop theories about saturation diving. Bond's team exposed rats, goats, monkeys, and human beings to various gas mixtures at different pressures. By 1963 they had collected enough data to test the first SEALAB habitat. At the time, Jacques Cousteau and Edwin A. Link were pursuing privately funded saturation diving projects to study long-term underwater living. Link's efforts resulted in the first underwater habitat, occupied by aquanaut Robert Sténuit in the Mediterranean Sea at a depth of for one day on September 6, 1962. Cousteau's habitats included Conshelf I, with a 2-person crew at a depth of near Marseilles, placed on September 14, 1962, and Conshelf II, placed in the Red Sea at depths of on June 15, 1963. Later that year, the Kennedy administration decided to open a new "race" frontier, directing the navy to begin the SEALAB program. == SEALAB I ==

SEALAB I was commanded by Captain Bond, who became known as "Papa Topside." SEALAB I proved that saturation diving in the open ocean was viable for extended periods. The experiment also offered information about habitat placement, habitat umbilicals, humidity, and helium speech descrambling. SEALAB I demonstrated the same issues as Conshelf: high humidity, temperature control, and verbal communication in the helium atmosphere. SEALAB I is on display at the Man in the Sea Museum, in Panama City Beach, Florida, near where it was initially tested offshore before being deployed. It is on outdoor display. Its metal hull is largely intact, though the paint faded to a brick red over the years. The habitat's exterior was restored as part of its 50th anniversary, and it sports its original colors. ==SEALAB II==

SEALAB II was launched in 1965. They were aided by a bottlenose dolphin named Tuffy from the United States Navy Marine Mammal Program. Aquanauts and Navy trainers attempted, with mixed results, to teach Tuffy to ferry supplies from the surface to SEALAB or from one diver to another, and to come to the rescue of an aquanaut in distress. When the SEALAB II mission ended on 10 October 1965, there were plans for Tuffy also to take part in SEALAB III. A sidenote from SEALAB II was a congratulatory telephone call that was arranged for Carpenter and President Lyndon B. Johnson. Carpenter was calling from a decompression chamber with helium gas replacing nitrogen, so Carpenter sounded unintelligible to operators. The tape of the call circulated for years among Navy divers before it was aired on National Public Radio in 1999. In 2002, a group of researchers from the Scripps Institution of Oceanography's High Performance Wireless Research and Education Network boarded the and used a Scorpio ROV to find the site of the SEALAB habitat. ==SEALAB III==

With naval research funding constrained by Vietnam War combat requirements, Preparations for such a deep dive were extensive. In addition to many biomedical studies, work-up dives were conducted at the U.S. Navy Experimental Diving Unit at the Washington, D.C., Navy Yard. These “dives” were not done in the open sea, but in a special hyperbaric chamber that could recreate the pressures at depths as great as of sea water. According to John Piña Craven, the U.S. Navy's head of the Deep Submergence Systems Project of which SEALAB was a part, SEALAB III "was plagued with strange failures at the very start of operations." USS Elk River (IX-509) was specially fitted as a SEALAB operations support ship to replace Berkone; but the project was 18 months late and three million dollars over budget when SEALAB III was lowered to off San Clemente Island, California, on 15 February 1969. SEALAB team members were tense and frustrated by these delays, and began taking risks to make things work. When a poorly sized neoprene seal caused helium to leak from the habitat at an unacceptable rate, four divers volunteered to repair the leak in place rather than lifting the habitat to the surface. Their first attempt was unsuccessful, and the divers had been awake for twenty hours using amphetamines to stay alert for a second attempt, A U.S. Navy Board of Inquiry found that Cannon's rebreather was missing baralyme, the chemical necessary to remove carbon dioxide. Surgeon commander John Rawlins, a Royal Navy medical officer assigned to the project, also suggested that hypothermia during the dive was a contributing factor to the problem not being recognized by the diver. According to Craven, while the other divers were undergoing the week-long decompression, repeated attempts were made to sabotage their air supply by someone aboard the command barge. Eventually, a guard was posted on the decompression chamber and the men were recovered safely. A potentially unstable suspect was identified by the staff psychiatrist, but the culprit was never prosecuted. Craven suggests this may have been done to spare the Navy bad press so soon after the incident. but no new habitats were built. NCEL (now a part of Naval Facilities Engineering Service Center) of Port Hueneme, California, was responsible for the handling of several contracts involving life support systems used on SEALAB III.{{cite book |first1=John J. |last1=Bayles |first2=Douglas |last2=Taylor |name-list-style=amp |title=Aquanauts Composite Life Support Umbilicals - SEALAB III|date=2005 A model of SEALAB III can be found at the Man in the Sea Museum in Panama City Beach, Florida. ==See also==