STS-37 Atlantis, Orbiter Vehicle (OV) 104, Mission Specialist (MS) Jerome Apt, wearing extravehicular mobility unit (EMU), operates the crew and equipment translation aid (CETA) mechanical pump cart during an underwater simulation in JSC's Weightless Environment Training Facility (WETF) Bldg 29. EMU-suited MS Jerry L. Ross manipulates tether shuttle at the end of the CETA rail or track. CETA is a type of railroad hand cart planned as a spacewalker's transportation system along the truss of Space Station Freedom (SSF). SCUBA-equipped divers monitor the astronauts' activity.
