page_title: Outline of underwater divers
section_title: Aquanauts
hierarchical_section_title: Outline of underwater divers / Aquanauts
caption_attribution_description: NASA astronaut Sunita Williams
context_page_description: Underwater divers are people who take part in underwater diving activities – Underwater diving is practiced as part of an occupation, or for recreation, where the practitioner submerges below the surface of the water or other liquid for a period which may range between seconds to order of a day at a time, either exposed to the ambient pressure or isolated by a pressure resistant suit, to interact with the underwater environment for pleasure, competitive sport, or as a means to reach a work site for profit or in the pursuit of knowledge, and may use no equipment at all, or a wide range of equipment which may include breathing apparatus, environmental protective clothing, aids to vision, communication, propulsion, maneuverability, buoyancy and safety equipment, and tools for the task at hand.
context_section_description: Aquanaut – Diver who remains at depth underwater for longer than 24 hours
  Astronauts – Person who commands, pilots, or serves as a crew member of a spacecraft
  Joseph M. Acaba – American educator, hydrogeologist, and NASA astronaut
  Clayton Anderson – Retired NASA astronaut and member of the ISS Expedition 15 crew
  Richard R. Arnold – American educator and NASA astronaut on Space Shuttle mission STS-119
  Serena Auñón-Chancellor – American physician, engineer, and NASA astronaut
  Michael Barratt (astronaut) – American aerospace medicine physician and a NASA astronaut with two flights
  Robert L. Behnken – United States Air Force officer, NASA astronaut and former Chief of the Astronaut Office
  Randolph Bresnik – United States Marine Corps officer and a NASA astronaut on three expeditions
  Scott Carpenter – American test pilot, astronaut and aquanaut
  Gregory Chamitoff – Canadian born engineer and NASA astronaut
  Catherine Coleman – American chemist and former United States Air Force officer and NASA astronaut
  Timothy Creamer – NASA flight director, retired astronaut and a colonel in the United States Army
  Jeanette J. Epps
  Andrew J. Feustel – Geophysicist and NASA astronaut
  Michael Fincke – United States Air Force officer and NASA astronaut
  Satoshi Furukawa – Japanese surgeon and JAXA astronaut
  Ronald J. Garan Jr. – American astronaut
  Michael L. Gernhardt – NASA astronaut and manager of Environmental Physiology Laboratory
  Chris Hadfield – retired Canadian astronaut
  Jeremy Hansen – Canadian astronaut with the Canadian Space Agency
  José M. Hernández – American engineer and former NASA astronaut
  John Herrington – Retired United States Naval Aviator and former NASA astronaut
  Akihiko Hoshide – Japanese engineer and JAXA astronaut
  Norishige Kanai – Japanese doctor and JAXA astronaut
  Scott Kelly (astronaut) – American engineer, retired astronaut, and retired U.S. Navy captain
  Timothy Kopra – Engineer, Colonel in the United States Army, and former commander of the International Space Station
  Michael López-Alegría – American astronaut
  Sandra Magnus – American engineer and former NASA astronaut
  Thomas Marshburn – American physician and NASA astronaut
  K. Megan McArthur – American oceanographer and NASA astronaut
  Jessica Meir
  Dorothy Metcalf-Lindenburger – Former American astronaut
  Andreas Mogensen – Danish engineer and ESA astronaut
  Soichi Noguchi – Japanese aeronautical engineer and a JAXA astronaut
  Karen Nyberg – American mechanical engineer and NASA astronaut
  John D. Olivas – American engineer and a former NASA astronaut
  Takuya Onishi – Japanese engineer, commercial pilot and astronaut from JAXA
  Luca Parmitano – Italian engineer, pilot and ESA astronaut
  Nicholas Patrick – British-American engineer and former NASA astronaut
  Tim Peake – British Army Air Corps officer and European Space Agency astronaut
  Thomas Pesquet – French aerospace engineer, pilot, and astronaut
  Marc Reagan – American Station Training Lead in Mission Operations at NASA's Johnson Space Center
  Garrett Reisman – American engineer and former NASA astronaut
  Kathleen Rubins – American microbiologist and NASA astronaut
  David Saint-Jacques – Canadian engineer, astrophysicist, physician and CSA astronaut
  Heidemarie Stefanyshyn-Piper – American Naval officer and former NASA astronaut
  Hervé Stevenin – European aquanaut at the European Astronaut Centre
  Nicole Stott – American engineer and NASA astronaut
  Daniel M. Tani – American engineer and NASA astronaut
  Robert Thirsk – Canadian engineer and physician, and former CSA astronaut
  Bill Todd – Project Manager for Exploration Analogs at NASA's Johnson Space Center
  Mark T. Vande Hei – American engineer and NASA astronaut
  Koichi Wakata – Japanese engineer and a JAXA astronaut
  Rex J. Walheim – United States Air Force officer, engineer and a NASA astronaut.
  Shannon Walker – American scientist and NASA astronaut
  Douglas H. Wheelock – American engineer and astronaut.
  Peggy Whitson – American biochemistry researcher and NASA astronaut
  Dafydd Williams – Canadian physician, public speaker and retired CSA astronaut
  Jeffrey Williams (astronaut) – Re
caption: Sunita Williams
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