Astronaut Thomas D. Akers gets assistance in donning a training version of the Shuttle extravehicular mobility unit (EMU) space suit prior to a training session in the Neutral Buoyancy Simulator at Marshall Space Flight Center (MSFC) (39735); Astronaut Kathryn C. Thornton (foreground) and Thomas Akers, STS-61 mission specialists scheduled for extravehicular activity (EVA) duty, prepare for an underwater rehearsal session. Thornton recieves assistance from a technician in donning her EMU gloves (39736).
STS-61 crewmembers participate in neutral buoyancy training at MSFC
S92-42755 (31 July 1992) --- Astronaut Susan J. Helms, mission specialist assigned to fly aboard the Space Shuttle Endeavour for the STS-54 mission, completes the donning of her spacesuit before a training exercise. Though not assigned to the scheduled extravehicular activity (EVA), Helms is trained in the weightless environment training facility (WET-F).  She will aid astronauts Gregory J. Harbaugh and Mario Runco Jr. in their planned EVA, scheduled for January of next year, and serve a backup role.  Wearing this high fidelity training version of the extravehicular mobility unit (EMU), Helms was later lowered into the 25-ft. deep WET-F pool.  The pressurized suit is weighted so as to allow Helms to achieve neutral buoyancy and simulate the various chores of the spacewalk.
STS-54 MS3 Helms tests CCA equipment prior to an underwater simulation at JSC
S92-42754 (31 July 1992) --- Astronaut Susan J. Helms, mission specialist assigned to fly aboard the Space Shuttle Endeavour for the STS-54 mission, gets assistance to complete the donning of her spacesuit.  Though not assigned to the scheduled extravehicular activity (EVA), Helms is trained in the weightless environment training facility (WET-F).  She will aid astronauts Gregory J. Harbaugh and Mario Runco Jr. in their planned EVA, scheduled for January of next year, and serve a backup role.  Wearing this high fidelity training version of the extravehicular mobility unit (EMU), Helms was later lowered into the 25-ft. deep WET-F pool.  The pressurized suit is weighted so as to allow Helms to achieve neutral buoyancy and simulate the various chores of the spacewalk.
STS-54 MS3 Helms, in EMU, on platform prior to underwater simulation at JSC
S92-42753 (31 July 1992) --- Astronaut Susan J. Helms, mission specialist assigned to fly aboard the Space Shuttle Endeavour for the STS-54 mission, gets assistance to complete the donning of her spacesuit.  Though not assigned to the scheduled extravehicular activity (EVA), Helms is trained in the weightless environment training facility (WET-F).  She will aid astronauts Gregory J. Harbaugh and Mario Runco Jr. in their planned EVA, scheduled for January of next year, and serve a backup role.  Wearing this high fidelity training version of the extravehicular mobility unit (EMU), Helms was later lowered into the 25-ft. deep WET-F pool.  The pressurized suit is weighted so as to allow Helms to achieve neutral buoyancy and simulate the various chores of the spacewalk.
STS-54 MS3 Susan J. Helms dons EMU for underwater simulation in JSC's WETF
S98-08181 (March 1998) --- Standing on a mobile platform, astronaut Catherine G. Coleman is in the processing of being submerged in the deep pool of  JSC's Neutral Buoyancy Laboratory (NBL).  Coleman was participating in a simulation of a contingency space walk  in preparation for the STS-93 mission next year. The mission specialist   will join four other NASA astronauts for the Space Shuttle Columbia flight, scheduled for spring.  The training version of the extravehicular mobility unit (EMU) that Coleman is wearing is  weighted and otherwise accommodated to afford neutral buoyancy in the deep pool.
Astronauts at the NBL during ISS diving tests
JSC2003-00014 (7 January 2003) --- Astronaut Christer Fuglesang, STS-116 mission specialist, wearing a training version of the Extravehicular Mobility Unit (EMU) spacesuit, participates in an underwater simulation of extravehicular activity (EVA) scheduled for the 19th shuttle mission to the International Space Station (ISS). Fuglesang was joined by astronaut Robert L. Curbeam, Jr. (out of frame), mission specialist, for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center. Fuglesang represents the European Space Agency (ESA).
Photographic coverage STS-116 crew training underwater in the NBL.
JSC2002-00511 (15 January 2002) --- Astronaut Philippe Perrin, STS-111 mission specialist, wears a training version of the Extravehicular Mobility Unit (EMU) space suit during an underwater simulation of extravehicular activity (EVA) scheduled for the 14th shuttle mission to the International Space Station (ISS). Perrin, representing CNES, the French Space Agency, was joined by astronaut Franklin R. Chang-Diaz (out of frame) for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center.
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JSC2002-00507 (15 January 2002) --- Astronaut Philippe Perrin, STS-111 mission specialist, wears a training version of the Extravehicular Mobility Unit (EMU) space suit during an underwater simulation of extravehicular activity (EVA) scheduled for the 14th shuttle mission to the International Space Station (ISS). Perrin, representing CNES, the French Space Agency, was joined by astronaut Franklin R. Chang-Diaz (out of frame) for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center.
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JSC2003-00011 (7 January 2003) --- Astronaut Christer Fuglesang, STS-116 mission specialist, wearing a training version of the Extravehicular Mobility Unit (EMU) spacesuit, participates in an underwater simulation of extravehicular activity (EVA) scheduled for the 19th shuttle mission to the International Space Station (ISS). Fuglesang was joined by astronaut Robert L. Curbeam, Jr. (out of frame), mission specialist, for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center. Fuglesang represents the European Space Agency (ESA).
Photographic coverage STS-116 crew training underwater in the NBL.
JSC2003-00013 (7 Jan. 2003) --- Astronaut Robert L. Curbeam, Jr., STS-116 mission specialist, wearing a training version of the Extravehicular Mobility Unit (EMU) spacesuit, participates in an underwater simulation of extravehicular activity (EVA) scheduled for the 19th shuttle mission to the International Space Station (ISS). Curbeam was joined by astronaut Christer Fuglesang (out of frame), mission specialist, for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center. Fuglesang represents the European Space Agency (ESA).
Photographic coverage STS-116 crew training underwater in the NBL.
JSC2003-00017 (7 January 2003) --- Astronauts Robert L. Curbeam, Jr. and Christer Fuglesang, STS-116 mission specialists, wearing training versions of the Extravehicular Mobility Unit (EMU) spacesuit, participate in an underwater simulation of extravehicular activity (EVA) scheduled for the 19th shuttle mission to the International Space Station (ISS).  Curbeam and Fuglesang are dwarfed by station truss segments in this overall view of the simulation conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center. Fuglesang represents the European Space Agency (ESA).
Photographic coverage STS-116 crew training underwater in the NBL.
JSC2003-00016 (7 January 2003) --- Astronauts Robert L. Curbeam, Jr. and Christer Fuglesang, STS-116 mission specialists, wearing training versions of the Extravehicular Mobility Unit (EMU) spacesuit, participate in an underwater simulation of extravehicular activity (EVA) scheduled for the 19th shuttle mission to the International Space Station (ISS).  Curbeam and Fuglesang are dwarfed by station truss segments in this overall view of the simulation conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center. Fuglesang represents the European Space Agency (ESA).
Photographic coverage STS-116 crew training underwater in the NBL.
JSC2003-00012 (7 Jan. 2003) --- Astronaut Robert L. Curbeam, Jr., STS-116 mission specialist, wearing a training version of the Extravehicular Mobility Unit (EMU) spacesuit, participates in an underwater simulation of extravehicular activity (EVA) scheduled for the 19th shuttle mission to the International Space Station (ISS). Curbeam was joined by astronaut Christer Fuglesang (out of frame), mission specialist, for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center. Fuglesang represents the European Space Agency (ESA).
Photographic coverage STS-116 crew training underwater in the NBL.
JSC2002-00510 (15 January 2002) --- Astronaut Philippe Perrin, STS-111 mission specialist, wears a training version of the Extravehicular Mobility Unit (EMU) space suit during an underwater simulation of extravehicular activity (EVA) scheduled for the 14th shuttle mission to the International Space Station (ISS). Perrin, representing CNES, the French Space Agency, was joined by astronaut Franklin R. Chang-Diaz (out of frame) for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center.
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JSC2002-00508 (15 January 2002) --- Astronaut Philippe Perrin, STS-111 mission specialist, wears a training version of the Extravehicular Mobility Unit (EMU) space suit during an underwater simulation of extravehicular activity (EVA) scheduled for the 14th shuttle mission to the International Space Station (ISS). Perrin, representing CNES, the French Space Agency, was joined by astronaut Franklin R. Chang-Diaz (out of frame) for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center.
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S98-08195  (March 1998) --- Standing on a mobile platform, astronaut Catherine G. Coleman is assisted with final touches for suiting up for a training exercise in the deep pool of  JSC's Neutral Buoyancy Laboratory (NBL).  Coleman was participating in a simulation of a contingency space walk  in preparation for the STS-93 mission next year. The mission specialist   will join four other NASA astronauts for the Space Shuttle Columbia flight, scheduled for spring.  The training version of the extravehicular mobility unit (EMU) that Coleman is wearing is  weighted and otherwise accommodated to afford neutral buoyancy in the deep pool.
Astronauts at the NBL during ISS diving tests
JSC2007-E-26261 (4 April 2007) --- Astronaut Dafydd R. (Dave) Williams, STS-118 mission specialist representing the Canadian Space Agency, wearing a training version of the Extravehicular Mobility Unit (EMU) spacesuit, participates in an underwater simulation of extravehicular activity (EVA) in the Neutral Buoyancy Laboratory (NBL) near Johnson Space Center. SCUBA-equipped divers are in the water to assist Williams in his rehearsal, intended to help prepare him for work on the exterior of the International Space Station.
Dave Williams underwater at NBL during STS-118 EVA Training
JSC2005-E-04328 (26 January 2005) --- Astronauts Soichi Noguchi (foreground) representing Japan Aerospace Exploration Agency (JAXA), and Stephen K. Robinson, both STS-114 mission specialists, wear training versions of the Extravehicular Mobility Unit (EMU) spacesuit during an underwater simulation of extravehicular activities (EVA) conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center (JSC).
NBL Underwater Photography of STS-114 Crew Training
Astronaut Thomas D. Akers gets assistance in donning a training version of the Shuttle extravehicular mobility unit (EMU) space suit prior to a training session in the Neutral Buoyancy Simulator at Marshall Space Flight Center (MSFC) (39735); Astronaut Kathryn C. Thornton (foreground) and Thomas Akers, STS-61 mission specialists scheduled for extravehicular activity (EVA) duty, prepare for an underwater rehearsal session. Thornton recieves assistance from a technician in donning her EMU gloves (39736).
STS-61 crewmembers participate in neutral buoyancy training at MSFC
JSC2005-E-04329 (26 January 2005) --- Astronauts Soichi Noguchi (foreground) representing Japan Aerospace Exploration Agency (JAXA), and Stephen K. Robinson, both STS-114 mission specialists, wear training versions of the Extravehicular Mobility Unit (EMU) spacesuit during an underwater simulation of extravehicular activities (EVA) conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center (JSC).
NBL Underwater Photography of STS-114 Crew Training
JSC2007-E-26262 (4 April 2007) --- Astronaut Dafydd R. (Dave) Williams, STS-118 mission specialist representing the Canadian Space Agency, wearing a training version of the Extravehicular Mobility Unit (EMU) spacesuit, participates in an underwater simulation of extravehicular activity (EVA) in the Neutral Buoyancy Laboratory (NBL) near Johnson Space Center. SCUBA-equipped divers are in the water to assist Williams in his rehearsal, intended to help prepare him for work on the exterior of the International Space Station.
Dave Williams underwater at NBL during STS-118 EVA Training
JSC2005-E-04330 (26 January 2005) --- Astronauts Soichi Noguchi (foreground) representing Japan Aerospace Exploration Agency (JAXA), and Stephen K. Robinson, both STS-114 mission specialists, wear training versions of the Extravehicular Mobility Unit (EMU) spacesuit during an underwater simulation of extravehicular activities (EVA) conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center (JSC).
NBL Underwater Photography of STS-114 Crew Training
S93-33101 (5 Apr 1993) --- Wearing a training version of Space Shuttle Extravehicular Mobility Unit (EMU), astronaut Kathryn C. Thornton uses the giant pool of the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F) to rehearse for the Hubble Space Telescope (HST) repair mission.  Standing on a mobile foot restraint connected to the Shuttle's robot arm, Thornton grasps a large structure which attaches to the Wide Field/Planetary Camera (WF/PC).  The current WF/PC on the HST will be replaced with WF/PC-2.  Out of frame is astronaut Thomas D. Akers, who will join Thornton in STS-61 EVA.  A SCUBA-equipped diver can be seen in the background.  A number of divers are on hand for all training sessions in the WET-F.  A total of five extravehicular activity (EVA) sessions will be conducted during the scheduled December mission of the Endeavour.
STS-61 crewmembers in the WETF rehearsing for HST repair mission
STS-38 Mission Specialist (MS) Carl J. Meade, wearing extravehicular mobility unit (EMU) upper torso, takes a breather from suit donning activities in JSC's Weightless Environment Training Facility (WETF) Bldg 29. Meade is preparing for an underwater extravehicular activity (EVA) simulation. During the training exercise, Meade will rehearse contingency EVA procedures for the STS-38 mission aboard Atlantis, Orbiter Vehicle (OV) 104.
STS-38 Mission Specialist (MS) Carl J. Meade during EMU donning in JSC's WETF
S93-30237 (5 Mar 1993) --- Wearing training versions of Space Shuttle Extravehicular Mobility Units (EMU), astronauts Thomas D. Akers (red stripe) and Kathryn C. Thornton use the spacious pool of the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F) to rehearse for the Hubble Space Telescope (HST) servicing mission.  They are working with part of a full-scale mockup of HST.
STS-61 crewmembers in the WETF rehearsing for HST repair mission
JSC2002-E-40329 (20 September 2002) ---  Astronaut Stephen K. Robinson, STS-114 mission specialist, wears a training version of the Extravehicular Mobility Unit (EMU) spacesuit during an underwater simulation of extravehicular activity (EVA) scheduled for the 17th shuttle mission to the International Space Station (ISS). Astronaut Soichi Noguchi (out of frame), mission specialist, joined Robinson for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center (JSC). Noguchi represents Japan’s National Space Development Agency (NASDA).
STS-114 EVA training at the NBL
JSC2002-E-40328 (20 September 2002) --- Astronaut Soichi Noguchi, STS-114 mission specialist, wears a training version of the Extravehicular Mobility Unit (EMU) spacesuit during an underwater simulation of extravehicular activity (EVA) scheduled for the 17th shuttle mission to the International Space Station (ISS). Astronaut Stephen K. Robinson (out of frame), mission specialist, joined Noguchi for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center (JSC). Noguchi represents Japan’s National Space Development Agency (NASDA).
STS-114 EVA training at the NBL
JSC2002-E-40332 (20 September 2002) --- Astronaut Soichi Noguchi, STS-114 mission specialist, wears a training version of the Extravehicular Mobility Unit (EMU) spacesuit during an underwater simulation of extravehicular activity (EVA) scheduled for the 17th shuttle mission to the International Space Station (ISS). Astronaut Stephen K. Robinson (partially obscured), mission specialist, joined Noguchi for the simulation, conducted in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center (JSC). Noguchi represents Japan’s National Space Development Agency (NASDA).
STS-114 EVA training at the NBL
JSC2010-E-185491 (12 Nov. 2010) --- NASA astronaut Andrew Feustel, STS-134 mission specialist, wearing a liquid cooling and ventilation garment that complements the Extravehicular Mobility Unit (EMU) spacesuit, participates in a training session in the simulation control area in the Neutral Buoyancy Laboratory (NBL) at the Sonny Carter Training Facility near NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
STS-134 crew members Mike Fincke and Greg Chamitoff
JSC2011-E-029098 (25 March 2011) --- NASA astronauts Michael Fincke (left) and Greg Chamitoff (right), both STS-134 mission specialists, wearing liquid cooling and ventilation garments that complement the Extravehicular Mobility Unit (EMU) spacesuits, participate in a training session in the simulation control area in the Neutral Buoyancy Laboratory (NBL) at the Sonny Carter Training Facility near NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration
STS-134 crew members Michael Fincke and Greg Chamitoff during their final EVA4 training run at the NBL.
JSC2010-E-185492 (12 Nov. 2010) --- NASA astronauts Michael Fincke (seated left) and Andrew Feustel, both STS-134 mission specialists, wearing liquid cooling and ventilation garments that complement the Extravehicular Mobility Unit (EMU) spacesuits, participate in a training session in the simulation control area in the Neutral Buoyancy Laboratory (NBL) at the Sonny Carter Training Facility near NASA's Johnson Space Center. NASA astronaut Greg Chamitoff, mission specialist, is visible in the background. Photo credit: NASA or National Aeronautics and Space Administration
STS-134 crew members Mike Fincke and Greg Chamitoff
JSC2000-07406 (1 December 2000) --- Astronaut Umberto Guidoni (left), STS-100 mission specialist representing the European Space Agency (ESA), views a closed-circuit televising of an underwater space walk simulation performed by two crew mates.  The   simulation of the scheduled spring 2001 space walk took place at the Neutral Buoyancy Laboratory (NBL) at the Sonny Carter Training Facility.  Astronaut Jeffrey S. Ashby, pilot, is at center. Astronauts Scott E. Parazynski of the NASA-Johnson Space Center and Chris A. Hadfield of the Canadian Space Agency  (CSA), both  mission specialists and both equipped with training versions of the extravehicular mobility unit (EMU) space suits, were in the water at the time.
STS-100 crewmembers prepare to train in NBL
JSC2000-07082 (October 2000)--- Wearing a training version of the shuttle extravehicular mobility unit (EMU) space suit, astronaut Joseph R. Tanner, STS-97 mission specialist, simulates a space walk underwater in the giant Neutral Buoyancy Laboratory (NBL). Tanner was there, along with astronaut Carlos I. Noriega, to rehearse one of three scheduled space walks to make additions to the International Space Station (ISS). The five-man crew in early December will deliver the P6 Integrated Truss Segment, which includes the first US Solar arrays and a power distribution system.
STS-97 (4A) EVA training in NBL pool
STS-38 Mission Specialist (MS) Carl J. Meade, wearing liquid cooling and ventilation garment (LCVG) and extravehicular mobility unit (EMU) lower torso, crouches under EMU upper torso. Technicians extend the EMU sleeves as Meade reaches into upper torso during suit donning in JSC's Weightless Environment Training Facility (WETF) Bldg 29. Positioned on the WETF platform at pool side, Meade is preparing for an underwater extravehicular activity (EVA) simulation. During the training exercise, Meade will rehearse contingency EVA procedures for the STS-38 mission aboard Atlantis, Orbiter Vehicle (OV) 104.
STS-38 Mission Specialist (MS) Carl J. Meade dons EMU in JSC's WETF Bldg 29
STS-38 Mission Specialist (MS) Robert C. Springer, wearing extravehicular mobility unit (EMU), fastens the strap on his communications carrier assembly (CCA) cap during suit donning in JSC's Weightless Environment Training Facility (WETF) Bldg 29. Positioned on the WETF platform at pool side, Springer is preparing for an underwater extravehicular activity (EVA) simulation. During the training exercise, Springer will rehearse contingency EVA procedures for the STS-38 mission aboard Atlantis, Orbiter Vehicle (OV) 104.
STS-38 Mission Specialist (MS) Robert C. Springer dons EMU in JSC's WETF
STS-38 Mission Specialist (MS) Robert C. Springer dons extravehicular mobility unit (EMU) upper torso with technicians' assistance in JSC's Weightless Environment Training Facility (WETF) Bldg 29. Positioned on the WETF platform at pool side, Springer is preparing for an underwater extravehicular activity (EVA) simulation. During the training session, Springer will rehearse contingency EVA procedures for the STS-38 mission aboard Atlantis, Orbiter Vehicle (OV) 104.
STS-38 Mission Specialist (MS) Robert C. Springer dons EMU in JSC's WETF
S93-31701 (3 April 1993) --- Displaying the flexibility of his training version of the Shuttle Extravehicular Mobility Unit (EMU) space suit, astronaut David A. Wolf participates in training for contingency Extravehicular Activity (EVA) for the STS-58 mission.  Behind Wolf, sharing the platform with him was astronaut Shannon W. Lucid.  For simulation purposes, the two mission specialists were about to be submerged to a point of neutral buoyancy in the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F).  Though the Spacelab Life Sciences (SLS-2) mission does not include a planned EVA, all crews designate members to learn proper procedures to perform outside the spacecraft in the event of failure of remote means to accomplish those tasks.
Astronaut David Wolf participates in training for contingency EVA in WETF
S91-51058 (Dec 1991) --- Partially attired in a special training version of the Extravehicular Mobility Unit (EMU) space suit, astronaut Bernard A. Harris Jr. is pictured before a training session at the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F).  Minutes later the STS-55 mission specialist was in a 25-feet deep pool simulating a contingency extravehicular activity (EVA).  The platform on which he is standing was used to lower him into the water where, with the aid of weights on his environmentally-controlled pressurized suit, he was able to achieve neutral buoyancy. There is no scheduled EVA for the 1993 flight but each space flight crew includes astronauts trained for a variety of contingency tasks that could require exiting the shirt-sleeve environment of a Shuttle's cabin.
STS-55 MS3 Bernard A. Harris, Jr in EMU at JSC's WETF for EVA simulation
STS-48 Mission Specialist (MS) James F. Buchli, wearing an extravehicular mobility unit (EMU), is watched by SCUBA-equipped divers as the platform he is standing on is lowered into JSC's Weightless Environment Training Facility (WETF) Bldg 29 pool. When completely underwater, Buchli will be released from the platform and will perform contingency extravehicular activity (EVA) operations. This underwater simulation of a spacewalk is part of the training required for Buchli's upcoming mission aboard Discovery, Orbiter Vehicle (OV) 103.
STS-48 MS Buchli, in EMU, is lowered into JSC's WETF pool for EVA simulation
STS-37 Atlantis, Orbiter Vehicle (OV) 104, Mission Specialist (MS) Jerry L. Ross generates electrical power using hand pedals to move crew and equipment translation aid (CETA) cart along a rail during underwater session in JSC's Weightless Environment Training Facility (WETF) Bldg 29. Wearing an extravehicular mobility unit (EMU), Ross operates CETA electrical cart as MS Jerome Apt holds onto the back of the cart. The two crewmembers are practicing a extravehicular activity (EVA) spacewalk they will perform in OV-104's payload bay during STS-37. CETA is a type of railroad hand cart planned as a spacewalker's transportation system along the truss of Space Station Freedom (SSF). SCUBA divers monitor astronauts' underwater activity.
STS-37 crewmembers move CETA electrical cart along rail in JSC's WETF pool
S90-30521 (20 Feb 1990) --- Though no extravehicular activity is planned for STS-31, two crewmembers train for contingencies that would necessitate leaving their shirt sleeve environment of Discovery's cabin and performing chores with their Hubble Space Telescope payload or related hardware.  Astronaut Kathryn D. Sullivan, mission specialist, is seen egressing the hatchway of the airlock of a full scale mockup of a Shuttle cabin to interface with an HST mockup in JSC's 25.-ft. deep pool in the weightless environment training facility (WET-F).  Two SCUBA-equipped divers who assisted in the training session are also seen.  Astronaut Bruce McCandless II, mission specialist, is out of frame.
STS-31 MS Sullivan exits airlock mockup during JSC WETF underwater simulation
This overall view shows STS-31 Mission Specialist (MS) Bruce McCandless II (left) and MS Kathryn D. Sullivan making a practice space walk in JSC's Weightless Environment Training Facility (WETF) Bldg 29 pool. McCandless works with a mockup of the remote manipulator system (RMS) end effector which is attached to a grapple fixture on the Hubble Space Telescope (HST) mockup. Sullivan manipulates HST hardware on the Support System Module (SSM) forward shell. SCUBA-equipped divers monitor the extravehicular mobility unit (EMU) suited crewmembers during this simulated extravehicular activity (EVA). No EVA is planned for the Hubble Space Telescope (HST) deployment, but the duo has trained for contingencies which might arise during the STS-31 mission aboard Discovery, Orbiter Vehicle (OV) 103. Photo taken by NASA JSC photographer Sheri Dunnette.
STS-31 MS McCandless and MS Sullivan during JSC WETF underwater simulation
STS-31 Mission Specialist (MS) Bruce McCandless II (left), wearing an extravehicular mobility unit (EMU), maneuvers his way around a mockup of the remote manipulator system (RMS) end effector during an underwater simulation in JSC's Weightless Environment Training Facility (WETF) Bldg 29 pool. The end effector is attached to a grapple fixture on the Hubble Space Telescope (HST) mockup. As McCandless performs contingency extravehicular activity (EVA) procedures, fellow crewmember MS Kathryn D. Sullivan, in EMU, works on the opposite side of the HST mockup, and SCUBA-equipped divers monitor the activity. Though no EVA is planned for STS-31, the two crewmembers train for contingencies that would necessitate leaving the shirt sleeve environment of Discovery's, Orbiter Vehicle (OV) 103's, crew cabin and performing chores with the HST payload or related hardware in the payload bay (PLB).
STS-31 MS McCandless, in EMU, during JSC WETF underwater simulation