Tektite habitat

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Tektite I exterior

The Tektite habitat was an underwater laboratory which was the home to divers during Tektite I and II programs. The Tektite program was the first scientists-in-the-sea program sponsored nationally. The habitat capsule was placed in Great Lameshur Bay, Saint John, U.S. Virgin Islands in 1969 and again in 1970.[1][2]

Habitat[]

The Tektite habitat was designed and built by General Electric Company Space Division at the Valley Forge Space Technology Center in King of Prussia, Pennsylvania.[citation needed] The Project Engineer who was responsible for the design of the habitat was Brooks Tenney, Jr. Tenney also served as the underwater Habitat Engineer on the International Mission, the last mission on the Tektite II project.[citation needed] The Program Manager for the Tektite projects was Dr. Theodore Marton at General Electric.[citation needed] The habitat appeared as a pair of silos: two white metal cylinders 12.5 feet (3.81 m) in diameter and 18 feet (5.49 m) high, joined by a flexible tunnel and seated on a rectangular base in 43 feet (13.1 m) depth of water.[citation needed]

Tektite I[]

On 28 January 1969 a detachment from Amphibious Construction Battalion 2 augmented by an additional 17 Seabee divers from both the Atlantic and Pacific fleets as well as the 21st NCR began the installation of the habitat in Great Lameshur Bay in the U. S. Virgin Islands.[3] They had it completed on February 12. On February 15, 1969, three days later, four U.S. Department of Interior scientists (Ed Clifton, Conrad Mahnken, Richard Waller and John VanDerwalker) descended to the ocean floor to begin the ambitious diving project dubbed "Tektite I".[1] By March 18, 1969, the four aquanauts had established a new world's record for saturated diving by a single team. On April 15, 1969, the aquanaut team returned to the surface with over 58 days of marine scientific studies. More than 19 hours of decompression time were needed to accommodate the scientists' return to the surface.[4] The United States Office of Naval Research coordinated Tektite I.

Much of the research for Tektite I centered on humans in this new environment. Topics investigated would include: biology (blood changes, sleep patterns, oxygen toxicity),[5][6][7] decompression and decompression sickness,[4] microbiology[8][9] and mycology.[10]

Tektite II[]

Tektite II mission 6-50 team

The United States Department of the Interior coordinated Tektite II, with part of the funding coming from NASA, which was interested in the psychological study of the scientific teams working in closed environments, similar to that of spacecraft.

The missions were carried out in the summer of 1970 in Great Lameshur Bay, St. John Island, U.S. Virgin Islands, at a depth of 43-ft. Tektite II comprised ten missions lasting 10–20 days with four scientists and an engineer on each mission. The fifth mission, designated Mission 6-50, was the first all-female saturation dive team. The elite team of scientist-divers included Renate Schlentz True of Tulane, team leader Sylvia Earle, Ann Hurley Hartline and Alina Szmant, graduate students at Scripps Institution of Oceanography, and Margaret Ann "Peggy" Lucas Bond, a Villanova electrical engineering graduate who served as Habitat Engineer. The Tektite II missions were the first to undertake in-depth ecological studies from a saturation habitat.[2]

Medical and human research oversight for Tektite II was well documented in a series of reports covering a project overview,[11] saturation diving,[12] lessons learned from Tektite I,[13] application to Tektite II,[14] medical responsibilities and psychological monitoring,[15] medical supervision duties[16] medical and biological objectives[17] project logistics,[18] lessons learned,[19] excursions to deeper depths from storage pressure,[20] decompression tables,[21] general medical observations,[22] psychological observations,[23] blood changes[24] and general program conclusions.[25]

Tektite III[]

Tektite III (Project Tektite) was a wholly owned[by whom?] and operated California 501 C(3) Non-Profit Corporation.[dubious – discuss] Harold C. Ross was Project Manager. When Tektite II ended General Electric placed the habitat in storage in Philadelphia. A group of interested parties purchased the habitat from General Electric for $1.00 with the stipulation it would be removed from the GE storage facility.[citation needed] The habitat was trucked across the United States to Fort Mason in San Francisco where it was placed on display. Attempts were made to refurbish the habitat so it could be used in San Francisco Bay as a teaching tool.

By 1980 the habitat was fully restored and certified to be used underwater, but funds for actually submerging and operating the habitat again were not available. While the habitat was on display at Fort Mason, many school children were taken through the habitat free of charge by volunteers. Unfortunately lack of funds ended the project and the habitat was moved to storage along the Oakland Estuary[citation needed] in 1984. After several years, the habitat again deteriorated. In 1991 the habitat was dismantled by welding school students and the metal was recycled.[26]

Ecology[]

There were nine studies on the ecology of coral reef fishes carried out during the Tektite series:[2]

  • influence of herbivores on marine plants
  • bio-acoustic studies
  • observations on cleaner shrimps
  • isopods associated with reef fishes
  • behavior of reef fishes in relation to fish pots
  • bioturbation by the sand tilefish
  • escape response in a damsel fish
  • nocturnal-diurnal changeover in activity patterns, and
  • space resource-sharing

Physiology[]

A goal of the Tektite program was to prove that saturation diving techniques in an underwater laboratory, breathing a nitrogen-oxygen atmosphere could be safely and efficiently accomplished at a minimal cost.[2][4]

Lambertsen's "Predictive Studies Series" that started with Tektite I in 1969 and ended in 1997, researched many aspects of human physiology in extreme environments.[7]

See also[]

  • Underwater habitat – Human habitable underwater enclosure filled with breathable gas

References[]

  1. ^ Jump up to: a b Clifton HE, Mahnken CV, Van Derwalker JC, Waller RA (May 1970). "Tektite 1, man-in-the-sea project: marine science program". Science. 168 (3932): 659–63. doi:10.1126/science.168.3932.659. PMID 5438496.
  2. ^ Jump up to: a b c d Collette, BB (1996). "Results of the Tektite Program: Ecology of coral-reef fishes. In: MA Lang, CC Baldwin (Eds.) The Diving for Science…1996, "Methods and Techniques of Underwater Research"". Proceedings of the American Academy of Underwater Sciences Sixteenth Annual Scientific Diving Symposium, Smithsonian Institution, Washington, DC. Retrieved 2008-05-30.
  3. ^ Seabeemagazine online
  4. ^ Jump up to: a b c Edel PO (June 1971). "Delineation of emergency surface decompression and treatment procedures for project Tektite aquanauts". Aerosp Med. 42 (6): 616–21. PMID 5155147.
  5. ^ Johnson PC, Driscoll TB, Fischer CL (April 1971). "Blood volume changes in divers of Tektite I". Aerosp Med. 42 (4): 423–6. PMID 5155127.
  6. ^ Naitoh P, Johnson LC, Austin M (January 1971). "Aquanaut sleep patterns during tektite I: a 60-day habitation under hyperbaric nitrogen saturation". Aerosp Med. 42 (1): 69–77. PMID 5541094.
  7. ^ Jump up to: a b Clark JM (2004). "The Predictive Studies Series: Correlation of physiologic responses to extreme environmental stresses". Undersea Hyperb Med. 31 (1): 33–51. PMID 15233158. Retrieved 2008-05-30.
  8. ^ Cobet AB, Wright DN, Warren PI (June 1970). "Tektite-I program: bacteriological aspects". Aerosp Med. 41 (6): 611–6. PMID 4392833.
  9. ^ Cobet AB, Dimmick RL (June 1970). "Tektite-I program: aerobiological aspects". Aerosp Med. 41 (6): 617–20. PMID 4392834.
  10. ^ Levine HB, Cobet AB (April 1970). "The tektite-I dive. Mycological aspects". Arch. Environ. Health. 20 (4): 500–5. doi:10.1080/00039896.1970.10665629. PMID 4393404.
  11. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. I. Introduction". Tex. Rep. Biol. Med. 30 (3): 5–8. PMID 4653767.
  12. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. II. Saturation diving". Tex. Rep. Biol. Med. 30 (3): 9–18. PMID 4653769.
  13. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. 3. Tektite I". Tex. Rep. Biol. Med. 30 (3): 19–28. PMID 4653762.
  14. ^ Beckman EL, Smith FM (1972). "Tektite II: medical supervision of the scientists in the sea. IV. Evolution of project Tektite II". Tex. Rep. Biol. Med. 30 (3): 29–34. PMID 4653764.
  15. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. V. Medical staff and responsibilities; psychological monitoring". Tex. Rep. Biol. Med. 30 (3): 35–41. PMID 4655601.
  16. ^ Beckman EL, Smith EM (1972). "Tektite II; medical supervision of the scientists in the sea. VI. The spectrum of medical supervision of the aquanauts". Tex. Rep. Biol. Med. 30 (3): 43–9. PMID 4653765.
  17. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. VII. Other medical and biological objectives". Tex. Rep. Biol. Med. 30 (3): 51–6. PMID 4653766.
  18. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. 8. Tektite logistics". Tex. Rep. Biol. Med. 30 (3): 57–84. PMID 4143923.
  19. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. IX. Mission-by-mission experiences". Tex. Rep. Biol. Med. 30 (3): 85–143. PMID 4653768.
  20. ^ Beckman EL, Smith EM (1972). "Tektite II; medical supervision of the scientists in the sea. X. The aborted 100-FSW (Minitat) program". Tex. Rep. Biol. Med. 30 (3): 145–53. PMID 4143922.
  21. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. XI. Decompression tables". Tex. Rep. Biol. Med. 30 (3): 155–69. PMID 4653760.
  22. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. XII. General medical observations". Tex. Rep. Biol. Med. 30 (3): 171–85. PMID 4675966.
  23. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. 13. Some preliminary psychological observations". Tex. Rep. Biol. Med. 30 (3): 187–90. PMID 4653761.
  24. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. XIV. Biochemical, hematological, and endocrine studies". Tex. Rep. Biol. Med. 30 (3): 191–201. PMID 4347306.
  25. ^ Beckman EL, Smith EM (1972). "Tektite II: medical supervision of the scientists in the sea. XV. Conclusions". Tex. Rep. Biol. Med. 30 (3): 203–4. PMID 4653763.
  26. ^ Tektite Underwater Habitat Museum - Tektite III (archived from the original) - Note that this page states: "Web page text edited and revised with permission from James W. Miller and Ian G. Koblick's book: Living and Working in the Sea, 1995.

Further reading[]

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